Who is Muhammad Yunus, the Nobel Peace Prize laureate who'll head Bangladesh's interim government?

Nobel Peace Prize laureate Muhammad Yunus has been chosen to head Bangladesh’s interim government after student protests sparked an uprising that toppled the former leader. Yunus is known as the “banker to the poorest of the poor” and will act as a caretaker premier until new elections are held. He was a longtime critic of the ousted Sheikh Hasina, who was accused of an increasingly authoritarian rule. Yunus called Hasina's resignation the country’s “second liberation day.” She once called him a “bloodsucker" but his supporters say he was targeted with corruption allegations because of his criticism of Hasina.