The U.S. Secret Service appears to have broken its own protocol with Hillary Clinton's early departure from Sunday's commemoration of the 15th anniversary of the Sept. 11, 2001, terrorist attacks at Ground Zero. In a widely circulated video of the Democratic presidential nominee's departure from the ceremony, Clinton can be seen leaning against a security bollard and then buckling and stumbling as her security detail helps her into a black van. According to a former Secret Service agent who reviewed the video, the detail was clearly rushing and did not expect for Clinton to leave at that time. The former...