Ingrid Betancourt Pulecio is a Colombian senator, anti-corruption activist and the leader of the Colombian Green Party. She also happens to be Colombia's most famous hostage. She was kidnapped by the FARC on February 23, 2002 while campaigning for the Presidency and hasn't been seen since.
You can find out more information at www.betancourt.info.
I've just started her book 'Unti Death Do Us Part: My Struggle to Relcaim Colombia' and am very impressed.