The Secret Service quickly called a lockdown of the park and White House and closed off Pennsylvania Avenue. Reporters ...

The White House was put on lockdown when an unknown object was thrown across the fence on the North Lawn. The press was ...

The Secret Service briefly locked down the White House's front lawn and nearby areas after an unidentified object was thrown ...

The White House was briefly placed under lockdown on Tuesday after a "phone" was thrown over the security fenceThe incident ...

The U.S. Secret Service closed off the North Lawn of the White House and directed all press personnel to shelter in the briefing room.

The Secret Service immediately initiated emergency protocol by locking down the White House and redirecting all press ...

The Secret Service shut down the front lawn of the White House, including to the news media, after a tourist threw something over the 13-foot fence. Press were moved inside to the White House briefing ...

The White House was briefly locked down on Tuesday after someone threw a phone over the North Lawn fence, prompting a Secret ...

The White House was put under a brief lockdown following an incident in the midday, after a ‘phone’ was supposedly thrown ...

The Secret Service put the White House's front lawn on a brief lockdown after a security incident near the front gate. It ...

This isn't the first unusual security incident at the White House this year. A few months ago, a child managed to slip ...

A security lockdown was instituted at the White House around 12:40 p.m. Eastern Time today following word that an airplane had flown into restricted White House airspace.