In July 2007, Catherine satinthe royal box at Wembley Stadium in London for the Concert for Diana, a massive charity concert to remember Prince William's mother, Princess Diana, 10 years after her death in a car crash.
The moderators also brought up William Ayers, a 1970s-era purveyor of left-wing, small-scale terrorism, who once sat on a charity board with Mr Obama, and had hosted a fundraiser for his state senate campaign inthe 1990s.