 The Secret Service worked with local law enforcement to maintain events security, including sniper teams poised on rooftops to identify and eliminate threats. Secret Service spokesman Anthony Giuliamini said, but no officers were posted on the building used by the would-be assassin outside the event security perimeter, but only about 140 yards from the stage within range of semi-automatic rifle like the one the government was carrying. Why does it matter where it was? They said it was a security risk.