Nearly a year ago, Morgan Tsvangirai was sworn in as the prime minister of Zimbabwe as part of a new unity government with Robert Mugabe, the country's president. But, power-sharing has been far from straightforward. Tsvangirai joins the show from Davos to discuss the challenges that remain. Plus, Abu Baker al-Qirbi, the Yemeni foreign minister, comedian Billy Connolly, Nato spokesman James Appathurai, and Nasser Judeh, Jordan's foreign minister.