U.S. President Barack Obama and first lady Michelle Obama walk past memorials for three slain soldiers as they depart after paying their respects at a memorial service at Fort Hood in Killeen Texas April 9, 2014. Last week, Army Spc. Ivan A. Lopez killed three and injured 16 others at Fort Hood before taking his own life. The shooting was the second deadly rampage at the base, one of the largest U.S. Army posts in the country, in five years. It raised questions about protecting soldiers at home and caring for troops battling mental illness, such as Lopez.
REUTERS/Kevin Lamarque (UNITED STATES - Tags: POLITICS CIVIL UNREST CRIME LAW MILITARY)