Katie Carmona, 44, lawyer, Austin, Tex.

“In front of us, there was a flash of glass and smoke that came across where we were walking on the sidewalk.”

Ms. Carmona and her husband, Paul, work on the organizing committee of the Austin Marathon. She ran the Boston Marathon in 2011, but this year was supporting Paul, who was raising money for Champions for Children to aid sick children in central Texas. Despite their proximity to the blast, she and her friend, Amy Berti, were barely injured.