US Shooting
US gunman opens fire in Manhattan skyscraper, kills 4 before suicide
US Naval Base Shooter Watched Shooting Videos Before Attack: Official
4 killed at festival in California's Gilroy, shooter dead: Reports
Teenager killed, several injured after two students open fire at Colorado school
Two dead in US university campus shooting in North Carolina: Reports
Three dead, four injured in shooting at California bowling alley: Police
US: 3 killed, 2 wounded in shooting at Maryland office park, gunman on run