The US Secret Service on April 19 said it is ending public access to the sidewalk in front of the White House, a concrete stretch on which millions of tourists have stood to have their photographs taken. The sidewalk has been closed nightly from 11:00pm to 6:00am since 2015 and will now be off-limits around the clock, the Secret Service announced in a statement, saying the closure will "lessen the possibility of individuals illegally accessing the White House grounds." The closure follows several recent incidents of incursions into the White House grounds by trespassers who have managed to scale the White House fence. Raising the height of the fence and putting sharp spikes on top of it has not deterred trespassers, so the Secret Service is extending the security perimeter. Visitors can still get themselves into the photo frame with the White House in the background from Lafayette Park across the street.