Heather Martin (left) was a student at Columbine High School in 1999. She met Sherrie Lawson, who worked at the Washington, D.C., Navy Yard in 2013 during the shooting there, through Martin’s support organization, the Rebels Project.

Heather Martin (left) was a student at Columbine High School in 1999. She met Sherrie Lawson, who worked at the Washington, D.C., Navy Yard in 2013 during the shooting there, through Martin’s support organization, the Rebels Project.