Martha Raddatz; 'Witness'; Gilberto Gil

Martha Raddatz reports on fellow ABC journalists Bob Woodruff and Doug Vogt who were injured in an attack in Iraq. Peter Gabriel and Gillian Caldwell, the co-founder and executive director of "Witness," and Van Jones of Books Not Bars, examine the use of video in the fight for human rights. The Minister of Culture for Brazil, Gilberto Gil, discusses music, politics, and the future of Brazil.