MEMPHIS, Tenn. (AP) — An academic turnaround at an urban high school with a rich tradition of educating African-Americans has earned graduating seniors a commencement address from President Barack Obama. Booker T. Washington High School found out it was the winner of a national competition in a phone call Tuesday from Vice President Joe Biden. The school's accomplishment was announced as the city of Memphis is enduring the second-worst flood of its history.