William E. Caswell
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William E. Caswell was a third-generation physicist whose work at the Navy was so classified that his family knew very little about what he did each day.

They don't even know exactly why he was headed to Los Angeles on the doomed American Airlines Flight 77.

"It was a trip he often took," his mother, Jean Caswell, said Friday. "We never knew what he was doing there because he couldn't say. You just learn not to ask questions."

It was an unusual feature of life in their family, which Caswell's parents described as very warm and close-knit. The Boston-born Caswell, 54, was very close to his wife, also named Jean, and to her son from a previous marriage, Sean O'Connor.

And nothing mattered more to him than the education of his 17-year-old daughter, Jennifer, a senior at a Silver Spring, Md., magnet high school with a specialty in science. Together, the two had been looking into colleges for her.

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Published in The State Journal-Register on Sep. 13, 2001.
Memories & Condolences
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48 entries
August 1, 2019
Im sorry you left this earth too soon. Be at peace...
September 11, 2018
Another year has passed and I still regret the lost of Bill and the contributions Bill would have given us.
Carl Larson
September 11, 2015
Thinking of Julie all day today, as I have every year - and as I will.
Blair Classmate
September 4, 2013
I lived across the street from the Caswells. I remember seeing William every day when he came out to get the mail. He had the most amazing smile. I always meant to say something to him, but somehow the opportunity never came. Now it never will. More than a decade has passed and I still remember his tousled hair, his rumpled untucked shirt, and his smile. 911 took something away from all of us, things that can never be replaced.
Ellen Wilds
December 21, 2011
We'll never forget that day, and I pause today to pray for and think of the friends and family that William left behind. Much love from Texas.
Del Newberry
September 11, 2011
May the light of freedom ever shine and the cause for which they died never be forgotten.
Duane Nickels
September 11, 2011
Somethings you can never forget
God Bless America
Painter Family
September 11, 2011
We Will never forget
Sherri Pouder
September 11, 2011
Jack and Rose Franklin - Our thoughts and prayers are with you all.
Rose Franklin
September 11, 2011
The Service was very moving and it really brought a new light to how people feel about the attacks.
Rob Gwilt
September 11, 2011
My prayers are with all those who have lost loved ones in the 9/11 attacks. May God be your strength and hope
John Bouldrey
September 11, 2011
This message is for the family of Bill, to whom I send my deepest sympathies.
I only knew Bill's father, Randy, when he worked at NBS in the 1970s, and when I worked at AFFRI, in Bethesda
Bob Carter
September 11, 2011
Today, I remember Bill and the work he did for the Navy, and regret his untimely loss.
May 2, 2011
It was my privilege to work with Bill for a number of years. Thoughtful, smart, and gentle are words that come to mind as I think of him.
Today our guys got UBL for Bill and the others.
God Bless you. Bill Caswell, and may God Bless your family.
June 13, 2010
The Caswells have always been a patriotic and intelligent group, my condolences, Dana J. caswell - Albany NY
June 22, 2009
Happy Birthday!!!
Doug Abraham
September 11, 2008
To the family of William E. Caswell:
William gave the ultimate sacrifice and will be held in the hearts of Americans forever. My deepest sympathy to you. We must never forget!
Peggy Childers
"Don't Let The Memory Of Them Drift Away"
Peggy Childers
June 27, 2008
My sympathies go out to the families of all those involved in 9/11 and particularly those of my namesake, Kathryn Caswell
Kathryn Caswell
July 6, 2007
In memory....
P Tabbernor
November 21, 2006
You are in my thoughts and prayers.
Tanya Caswell
October 25, 2006
As I cross-stitched your name on the memorial that I am doing for all of the victims, I prayed for you and your family. Please know that your death was not in vain. We will always remember. God Bless.
September 14, 2006
William, So many gone that we think of daily! Your story brings hero to my thoughts! In God's hands now! I want you to know that you are never forgotten!
September 11, 2006
Gingi, it's so hard to believe five years have passed. I wanted to pay my respects to your brother today. My thoughts are with you and your family.
Rise Shifra Shamansky
September 10, 2006
I'm sorry for your loss, Caswells. I'm sure Mr. Caswell is in a better place now. I also hope that you're all doing well and that Jennifer has found a good college. Again, my apologises
Tiffany Ho
September 10, 2006
Hello Caswell Family :]

I am sorry to hear about William E. Caswell. I was just reading these profiles and this has touched me. I hope the Caswells are doing fine.
Cherry Mae Egenias
September 10, 2006
I was honored to make a quilt square for William Caswell for the United In Memory Quilt. I made several and with each one, your mind in on that person, unknown to you, but feeling so close to them, it is almost as if you can reach out and touch them. May you rest in peace and may your family cherish the memories they have.
Mary Anne Sheffield
July 4, 2006
I am online doing a search to try to find out the history of my family name and stumbling across this site has really saddened and touched me, for we are all one great family of Caswells. So my thoughts and prayers really do go out to this Caswell family for their loss.
Samantha Caswell
September 28, 2005
So sorry to learn of William Caswell, though we never met, we are family by name. My prayers go to the family and William.
Kathryn Caswell
Kathryn Caswell
September 11, 2004
I wanted to say that I'm sorry to have a shipmate in the Navy to be involved in such a tragity. From my family to you and your family... We are sorry. Please rest in peace.
Daniel Dickson
August 16, 2004
I just learned recently after all this time that someone with the Caswell name perished on 9/11 my thoughts and prayers go towards your family from my family.. and will forever be in my thoughts even though we have never meet we are family by our name..may god be with you..
Kathryn Caswell
Kathryn caswell
January 9, 2004
May God Keep you and your Family you are in My Thoughts and Prayers
Lakia Hedgepeth
September 12, 2003
I only know Bill's sister Virginia, but since 9/11 Virginia and I had so many wonderful talks about life. I don't think she is ever out of my thoughts.
Margaret Martin
September 10, 2003
anne jones
October 18, 2002
I just want to let the Caswell family know that my thoughts and prayers are with them. I was just told that Bill was on the plane that hit the pentagon, and I'm having a very hard time with it. I first met Bill and Jean when Jennifer and my son attended elementary school together, and it's probably been as many years since I've seen them. Jennifer would come home with us until Bill or Jean got off work. My heart goes out to all of you, especially Jennifer, as I know you and your dad were very close.
Debbie Duncan
October 10, 2002
I never met William, or Bill as his family called him, but my parents know his parents. I grew up seeing pictures of Bill from Christmas cards his parents would send. Therefore I felt like I knew him. Anyway I would like to offer my thoughts and prayers to the family of William Caswell and hope they will be able to recover from this horrible tragedy.
Martha Class, daughter of Bernice and Calvin Class
Martha Class
September 11, 2002
When I heard the name William Caswell was in the attack, I was stunned because I have a brother named William. Our family's thoughts were immediately with you and your family. May God's grace be with you to give you strength.
Wayne Caswell
September 11, 2002
My thought and prayers are with your family today and always.
Maryanne Flynn
September 10, 2002
I took my grandchildren to see the "Wall" memorial at our local funeral home. This was the first listing of all the victims we had seen. Caswell is not a common name and we wanted to know more about this very very distant cousin. My dear husband just passed away last month and my heart is tender toward those who suffer loss. May God bless and strengthen you during this first anniversary.
CoraVee Caswell
September 2, 2002
A friend recently mentioned that a "Caswell" had perished on that terrible day, almost a year ago.
As a long distant relative may I offer condolences to William's family for a loss that will remain fresh with the passing of each September 11th.
Gwen Caswell Forrest
May 15, 2002
To the family of William Caswell- My thoughts and prayers are with you. Mr. Caswell died a hero, a hero to every American. I am so deeply sorry for his loss, and the only comfort I can offer is. He is in a much better place, shining down on you. Someday you will see him again. Rest in Peace William Caswell.
April 18, 2002
May God Bless you and the family and friends that knew and loved you. Rest in his loving peace.
Angie Campbell
April 5, 2002
Today, April 5, 2002, 1 mile was walked to honor the life of William E Caswell & all the family, friends, and loved ones he left behind. May you find some comfort in knowing that you do not grieve alone.

William, although you are gone, you will never be forgotten, may you rest in peace.
Kathy Swaringen
January 12, 2002
We are deeply sorry for your loss of William. May warm memories of times shared with him lighten the sorrow in your hearts. Our hearts cry with you.
America Cries
We see your sorrow-
and our hearts cry....
We can not erase your pain
but you do not have to face the anguish alone-for we-
-the American people-
are beside you.
We so desperately want to have the touch that brings you comfort,
the strength that gives you courage,
and the words to lighten your spirits.
And when we are left speechless
may the silence of our nation weave love into your hearts
to ease your sorrow.
May you find healing through our nation's strength as we-
-the American people-
face this difficult time together. Our hearts are with you. Teresa Jahn
Dixon, IL
Teresa Jahn
November 29, 2001
I am sorry for your loss. Sean I hope to hear from you some time. It's been a long time.
Bruce Wolper
October 25, 2001
Jennifer, you don't know me, but I am also a senior at your school in Silver Spring.

Let me just say that I offer my deepest and sincerest condolences. I can only imagine what you and your entire family have been going through, but I do feel hurt and pain over this senseless attack and loss of innocent lives. Know that you, your father, and your family have been in my prayers. And also know that if you ever need someone for whatever, please let me know what I can do to help.

Much love.
God bless.
Omar Guerrero
October 10, 2001
I need you to know that your family is in my prayers. I am so sorry for your loss
September 30, 2001
September 18, 2001
Though we've never met, you are a Caswell cousin who will be greatly missed. We greive with your immediate family and friends at the senselessness of your death. You will be forever in our hearts.
Nancy (Caswell) Simpson
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