Reagan delivered a luncheon address to AFL–CIO representatives at the Washington Hilton. The Secret Service was very familiar with the hotel, having inspected it more than 100 times for presidential visits since the early 1970s. The Hilton was considered the safest venue in Washington because of its secure, enclosed passageway called "President's Walk", built after the 1963 assassination of John F. Kennedy. Reagan entered the building through the passageway at about 1:45 p.m., waving to a crowd of news media and citizens. The Secret Service had required him to wear a bulletproof vest for some events, but Reagan was not wearing one for the speech, because his only public exposure would be the 30 feet (9 m) between the hotel and his limousine, and the agency did not require vests for agents that day. No one saw Hinckley behaving in an unusual way; witnesses who reported him as "fidgety" and "agitated" apparently confused Hinckley with another person that the Secret Service had been monitoring. Shooting At 2:27 p.m., Reagan exited the hotel through "President's Walk" on Florida Avenue, where reporters waited. He left the T Street NW exit toward his waiting limousine as Hinckley waited within the crowd of admirers. The Secret Service had extensively screened those attending the president's speech, but greatly erred by allowing an unscreened group to stand within of him, behind a rope line. The agency uses multiple layers of protection; local police in the outer layer briefly check people, Secret Service agents in the middle layer check for weapons, and more agents form the inner layer immediately around the president. Hinckley penetrated the first two layers. As several hundred people applauded Reagan, the president unexpectedly passed right in front of Hinckley. Reporters standing behind a rope barricade 20 feet away asked questions. As Mike Putzel of the Associated Press shouted "Mr. President—", Hinckley, believing he would never get a better chance, assumed a crouch position and rapidly fired a Röhm RG 14 .22 LR blue steel revolver six times in 1.7 seconds, missing the president with all six shots. The first round hit White House press secretary James Brady in the head above his left eye, passing through underneath his brain and shattering his brain cavity; the small explosive charge in the round exploded on impact. District of Columbia police officer Thomas Delahanty recognized the sound as a gunshot and turned his head sharply to