160613-N-JA159-001 WASHINTGON, D.C. (June 13, 2016) The American flag flies at half mast at the Naval Observatory in Washington, D.C.. President Barack Obama ordered all United States flags to half-staff as a mark of respect for the victims of the act of hatred and terror perpetrated on Sunday, June 12, 2016, in Orlando, Fla. (U.S. Navy photo by Geoff Chester/Released)