Peter, Quagmire, Joe, and Cleveland got involved in a mystery that took them down to Washington D.C. The quest to discover who wrote a dirty joke took the gang to a bizarro version of our nation's capital.

In the clip below, Quagmire points out the "Obama Monument" and the Vietnam War Memorial.

Peter Griffin gets into a fight with his own reflection in front of the Lincoln Memorial.

[via Hulu]