In related news, an FBI agent was just carjacked in front of the DOJ HQ building on Constitution Ave, only about 1 block from the White House. He appears to have been on the way home from work in his GOV. It appears he didn't put up any resistance.
This is unheard of for that area, which except for pick pocketing on the National Mall (which Constitution Ave is the northern border of) has historically been pretty safe due to the concentration of fairly heavy handed uniformed federal officers.