Babak Namazi, brother of freed prisoner Siamak Namazi discusses his brother's homecoming. Qatari Prime Minister Al-Thani on the deal his country brokered between the US and Iran. Al Gore speaks about the global status of climate change. Singaporean foreign minister Vivian Balakrishnan talks about China's growing influence. Billie Jean King on 50 years since winning the Battle of the Sexes.