U.S. Senator Barack Obama sits among journalists and photographers as he watches video footage shot by Academy awarding-winning actor George Clooney about his recent visit to the Darfur region of Sudan at a Washington news conference April 27, 2006. Clooney and his father, journalist Nick Clooney, have just returned from a week-long trip to southern Sudan and eastern Chad where they met with dozens of individuals affected by the crisis and documented the brutal and worsening conflict in Sudan?s Darfur region. REUTERS/Jason Reed