U.S. Ambassador to Ukraine: Discussion "over" on Crimea's future
Russians rally in Moscow to support annexation of Crimea
Judge bans broadcast of postmortem evidence in Pistorius trial
China urges Malaysia to speed up plane search
Still no sign of Malaysian jet lost in "unprecedented mystery"
Families of passengers on board missing flight wait for news
Missing Malaysia airlines plane a "mystery"
Syria rebels free kidnapped nuns
Syrian rebels and government forces battle
Ukrainian paratroopers, fighter jets prep for exercises
Pope delivers prayer before leaving for spiritual retreat
EU's Ashton in Iran says final nuclear deal 'challenging'