Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of the words: "Keep going" and a pattern with flowers, leaves, arrows, and shooting stars. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

Note from a member of The Church at Severn Run in Severn, Maryland. The note is enclosed in an envelope with church letterhead, reading: "The Church at Severn Run: Love Well, Live Jesus, Believe Big!" The note inside reads: "We are all God's People. Love and Praise." The church's contact information is included on the back of the envelope.

Oral history with Kathryn Fleisher recorded as part of the Meanings of October 27th oral history project.

Post-it note with handwritten message in black ink. The message reads: "We are all brothers and sisters. Your struggle is our struggle. - A Muslim." Color bleeding due to exposure to the elements at the Wilkins memorial.

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a pineapple with floral and geometric motifs. The back contains a handwritten note with a quote from the nineteenth century American poet Emily Dickinson, as well as the stock signature: "From your friends at West Allegheny Middle School."

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of the words: "Keep going" and a pattern with flowers, leaves, arrows, and shooting stars. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

Note from a member of The Church at Severn Run in Severn, Maryland. The note is enclosed in an envelope with church letterhead, reading: "The Church at Severn Run: Love Well, Live Jesus, Believe Big!" The note inside reads: "Dear friend, Greetings and peace be with you today. I thank God for the opportunity to write to you this morning. I just wanted to let you know that I am committed to praying for you and serving our communities together. The world is full of broken people. Some of these broken people have caused unimaginable pain. To you my Jewish friends.

Note from a member of The Church at Severn Run in Severn, Maryland. The note is enclosed in an envelope with church letterhead, reading: "The Church at Severn Run: Love Well, Live Jesus, Believe Big!" The note inside reads: "We mourn for you loss and we pray the God of Abraham embraces you in fresh, new ways today and always! Shalom!" The church's contact information is included on the back of the envelope.

Note from a member of The Church at Severn Run in Severn, Maryland. The note is enclosed in an envelope with church letterhead, reading: "The Church at Severn Run: Love Well, Live Jesus, Believe Big!" The note inside reads: "Stay strong, remain faithful, know you're loved. - Scott." The church's contact information is included on the back of the envelope.

Square card with white and yellow text against blue background. Card reads, "Mitzvah4Pittsburgh. Some spread darkness. We spread light. Choose a good deed. Choose a Mitzvah. Add light to the world," followed by four options and a place for respondents to list their name and email address. Some names and email addresses have been redacted for privacy.

Note from a member of The Church at Severn Run in Severn, Maryland. The note is enclosed in an envelope with church letterhead, reading: "The Church at Severn Run: Love Well, Live Jesus, Believe Big!" The note inside confirms God's love and urges the reader not to let hate triumph over faith. The church's contact information is included on the back of the envelope.

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a bird with a leaf in its mouth and geometric and floral motifs. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

Square card with white and yellow text against blue background. Card reads, "Mitzvah4Pittsburgh. Some spread darkness. We spread light. Choose a good deed. Choose a Mitzvah. Add light to the world," followed by four options and a place for respondents to list their name and email address. Some names and email addresses have been redacted for privacy.

Post-it note with handwritten message in black ink. The message reads: "Etz Chaim Hi. It is a tree of life for those who hold fast to it."

Black and white reproduction of an illustration originally printed in a newspaper, showing synagogue. Cropped selection from larger image.

Handwritten note written on lined notebook paper reading: "Filled with grief- Prayers for peace and justice."

Post-it note with handwritten message in green and red marker. The message reads: "Love is stronger than hate. Rest in peace. Jaime." The "o" in love and the dot in the "i" in Jaime are written with hearts.

Post-it note with handwritten message in blue marker. The message reads: "Thank you for being strong."

Square card with white and yellow text against blue background. Card reads, "Mitzvah4Pittsburgh. Some spread darkness. We spread light. Choose a good deed. Choose a Mitzvah. Add light to the world," followed by four options and a place for respondents to list their name and email address. Some names and email addresses have been redacted for privacy.

Card with illustration of two dragonflies on the cover. Message affirms the power of love to triumph over hate. The information on the back indicates that this card was purchased in support of UNICEF, the United Nations International Children's Emergency Fund.