Biden Joined by Clinton, Obama for Flight to Carter Tribute Service
• Former President Clinton, Hillary Clinton, and Michelle Obama traveled with President Biden on Air Force One to the Rosalynn Carter tribute service
• They were listed as passengers along with former Virginia Senator Chuck Robb and others
• Reporters did not spot them boarding initially but saw them exit the plane after it landed
• Michelle Obama and Hillary Clinton will join Laura Bush and Melania Trump at the Atlanta service
• Former President Carter, 99, is expected to attend the service for his late wife Rosalynn, who died last week at 96