U.S. first lady Michelle Obama, right, stands with Antoinette Sithole, left, after laying a wreath at the Hector Pieterson Memorial in Soweto, South Africa Wednesday June 22, 2011. Peaceful child protesters were gunned down by police 30 years ago in an attack that awakened the world to the brutality of the apartheid regime. At left, is an iconic picture of Antoinette, running with mouth open in a scream alongside a friend carrying the body of her slain brother, Hector. (AP Photo/Themba Hadebe)