“As a mark of respect for the victims of the senseless act of violence perpetrated on October 1, 2017, I hereby order that the flag of the United States shall be flown at half-staff at the White House and upon all public buildings and grounds, at all military posts and naval stations, and on all naval vessels of the Federal Government in the District of Columbia and throughout the United States and its Territories and possessions until sunset, October 6, 2017,” the message says.
Trump also directed that the flag is flown at half-staff for the same length of time at all United States embassies, legations, consular offices, and other facilities abroad, including all military facilities and naval vessels and stations.
As it was reported earlier the shooting in Las Vegas has become one of the largest mass shootings in the United States. Police have named Stephen Paddock, a 64-year-old from Mesquite, Nevada, as the suspect who opened fire. In the language of our law enforcers, he was not registered as a person inclined to criminal activity.
In general, the US could be called a "stepmother" of mass shootings.
According to the study of the American Sociological Association "Mass shooting, firearms and social tension: a global analysis of the exclusively American problem", there were 90 mass shootings in the USA during 1966-2012 (more than 4 persons died per episode). 290 people were killed. That is, 31% of all recorded cases. Philippines are at the second place (18 mass shootings). Russia is at the third place(15 mass shootings). This is without terrorist attacks and fighting.