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.
FOREIGN Secretary William Hague said Iran and its militant Shi'ite Lebanese ally Hizbollah were "propping up" Syrian President Bashar al Assad and giving him increasing support.
President Barack Obama has spoken of his gratitude to rescuers who helped some of the thousands of people caught up in the deadly storm he described as "one of the most destructive tornadoes in history".
Several bomb blasts have killed at least 12 people, a day after more than 70 died in attacks on majority Shi'ites, stoking fears of all-out sectarian war with minority Sunnis.