A silent prayer for the victims

Glenna and Steve Mooneyham kneel after placing flags and flowers at a sign leading to the Naval Operational Support and Marine Corps Reserve Center as a policeman stands nearby in Chattanooga

Glenna and Steve Mooneyham kneel after placing flags and flowers at a sign leading to the Naval Operational Support and Marine Corps Reserve Center where four marines were shot dead, as a policeman stands nearby in Chattanooga, Tennessee July 16, 2015. REUTERS/Tami Chappell