Why Malcolm X's murder was reevaluated

A New York judge on Thursday exonerated two men of assassinating Malcolm X. The iconic civil rights figure was gunned down in Manhattan in 1965. Muhammad Aziz and the late Khalil Islam were convicted, and imprisoned until the 1980's. A 22-month review of the convictions by the district attorney's office and lawyers for the two men found they had been wrongfully convicted. John Yang reports.