Astronaut Mark Kelly, husband of wounded Rep. Gabrielle Giffords, Arizona Democrat, is acknowledged by President Obama at the National Prayer Breakfast in Washington on Thursday, Feb. 3, 2011. (AP Photo/Charles Dharapak)

Photo by: Charles Dharapak

Astronaut Mark Kelly, husband of wounded Rep. Gabrielle Giffords, Arizona Democrat, is acknowledged by President Obama at the National Prayer Breakfast in Washington on Thursday, Feb. 3, 2011. (AP Photo/Charles Dharapak)