I'm a history obsessive, so I'm sorry I didn't do better.
I think, when I get home and do my children's homework, maybe I need to sit down and do a little bit extra myself.
Ouch! David Cameron may regret ever appearing on the Late Show with David Letterman.
David Cameron was subjected to a quiz on British culture and history as he appeared on one of the US's most influential chat shows.
The Prime Minister has agreed to an interview with David Letterman - a host notorious for setting his own agenda. This could be interesting.