The recent intrusion at the White House Correspondents’ Dinner has led to a new round of complaints and questions about the bounds of presidential protection. CNN’s Word of the Week asks former Secret Service agents what it means to set a “perimeter” around the president.

After the third attempt on President Trump's life, security concerns will further increase isolation of presidents from the public.

I’m dismayed by the conduct at the so-called security checkpoint. Not one of them were actively alert for any possible threat. They were all just either standing around chatting or otherwise occupied.

President Donald Trump is likely to face new security questions as he plans to attend a series of large, high-profile events in coming months.

President Donald Trump has released security footage from the reported White House Correspondents’ Dinner incident. Watch the video and latest updates.