WASHINGTON (AP) — One of the Secret Service’s toughest jobs is trying to balance public access to the White House with security of the presidential residence. White House security suffered an extraordinary breach this weekend when an ex-soldier allegedly jumped the fence, sprinted across the lawn and entered the mansion before he was apprehended just inside the front door.

Now the agency is examining what additional steps are needed to avoid such a security breach in the future. Security at “the People’s House” has increased gradually over the years, with the most dramatic changes coming in 1995 after the Oklahoma City federal building bombing that killed 167 people and injured hundreds more. President Bill Clinton ordered the stretch of Pennsylvania Avenue in front of the White House closed to traffic and much of the area was converted to a public plaza.