The flags surrounding the Washington Monument fly at half-staff as ordered by President Barack Obama following the deadly shooting Monday at the Washington Navy Yard, Tuesday morning, Sept. 17, 2013, in Washington. (AP Photo/J. Scott Applewhite)

Photo by: J. Scott Applewhite

The flags surrounding the Washington Monument fly at half-staff as ordered by President Barack Obama following the deadly shooting Monday at the Washington Navy Yard, Tuesday morning, Sept. 17, 2013, in Washington. (AP Photo/J. Scott Applewhite)