The U.S. Secret Service is a storied agency responsible for protecting the president and vice president as well as their families and other dignitaries, but a series of scandals and shortfalls dating back more than a decade have scarred the agency's reputation and laid bare vulnerabilities that have threatened to undercut its mission. The agency is drawing scrutiny once again after suspects impersonating federal law enforcement officers allegedly duped Secret Service agents and cozied up to them with free apartments and other gifts, a vulnerability that has at least one former official "aghast." Before that, there was a prostitution scandal in Colombia, a fence-jumper who made his way inside the White House and uninvited guests who snuck into a state dinner. But the agency also has new leadership and has implemented a number of policy changes. Here’s a timeline of scandals within the agency. Click the link in our bio to read the full story.