Officer-involved shooting near White House, tourist captures aftermath

White House placed on lockdown following shooting near 17th Street and Pennsylvania Avenue; Mark Meredith reports from Washington. #FoxNews Subscribe to Fox News! Watch more Fox News Video: Watch Fox News Channel Live: FOX News Channel (FNC) is a 24-hour all-encompassing news service delivering breaking news as well as political and business news. The number one network in cable, FNC has been the most-watched television news channe