Amnesty International is calling for the release of a Somali radio journalist captured Sunday by al-Shabab, an armed Islamic insurgent group. Ali Yusuf Adan, 47, a correspondent for Radio Somaliweyn, is being held by the group in Merka in southern Somalia, Amnesty International said Tuesday. He was captured in Wanleweyn, a town northwest of the capital Mogadishu controlled by the armed group. Read the official UPI release here…