President Barack Obama, First Lady Michelle Obama, and Mark Kelly

President Barack Obama, First Lady Michelle Obama, and Mark Kelly, the husband of Rep. Gabrielle Giffords, listen as Daniel Hernandez delivers remarks during the memorial service "Together We Thrive: Tucson and America" at the University of Arizona’s McKale Memorial Center in Tucson, Ariz., Jan. 12, 2011. (Official White House Photo by Pete Souza)