President Barack Obama urged Kenyans to fight corruption and ditch traditions such as treating women and minorities as second-class citizens on Sunday. In his first presidential trip to his father's homeland, Obama told a crowd in Nairobi there was "no limit to what you can achieve," but succeeding would require effort and responsibility. Obama arrived in Ethiopia on Monday, becoming the first serving U.S. leader to visit the country in the second leg of his African tour. He's expected to meet with government officials and discuss the South Sudan conflict with regional leaders. Obama will also become the first U.S. president to address the 54-member African Union at its headquarters in Addis Ababa on Tuesday.