Secret Service Agents Refuse To leave Barbara Bush's coffin at her funeral

The Secret Service agents who protected Barbara Bush for two decades after she left the White House have been standing guard over her coffin, refusing to the leave the side of the woman they say treated them like family. 

The agents swapped out at St. Martin's Episcopal Church in Houston, Texas, taking turns on Friday as mourners came in their droves to pay their respects to the former First Lady. 

They stood in the background as fans greeted former president George H.W. Bush in his wheelchair, giving a final act of protection to the 92-year-old.