Retired Secret Service agent, Paul Johnson, has raised concerns about the security of the White House Correspondents' Dinner in Washington D.C. following the attack. He stated that the Secret Service is trained to handle such a situation and their swift action saved lives. The incident occurred at the Washington Hilton Hotel, which was still open for business when the suspected shooter checked in and ran past security. Johnson expressed concern over shortfalls in security and inadequate access to weapons and perimeters. He also noted that the hotel had previously had two assassination attempts occur on its grounds. The investigation will determine if any mistakes were made and identify areas of improvement.