Twenty soldiers were killed and another 16 injured when a suicide bomber detonated a car packed with explosives inside a military installation in the city of Agadez in Niger.
President Barack Obama it to limit the use of US drone strikes and take steps aimed at breaking a deadlock on closing the military prison at Guantanamo Bay in Cuba.
RESCUE workers with sniffer dogs and searchlights picked through the wreckage of a massive tornado to ensure no survivors remained buried in the rubble of primary schools, houses and buildings in an Oklahoma City suburb.
Zimbabwe President Robert Mugabe has signed a new constitution into law, replacing a 33-year-old document forged in the dying days of British colonial rule and paving the way for elections later this year.