Reuters - Israeli Prime Minister Ehud Olmert defied a barrage of calls to resign on Friday after he admitted taking cash from an American businessman at the centre of a police inquiry into allegations of bribery.

AFP - A Canadian high school student has won a national science competition for her new molecule that binds to flu viruses, which may eventually be used to diagnose or prevent flu infections.

AP - The American Federation of Government Employees endorsed Barack Obama Friday, giving the Illinois senator fresh momentum toward capturing the Democratic nomination for president.

Reuters - Fewer than half of Americans can recognize the top five warning signs of stroke, information that could help save thousands of people from death and disability, the U.S. Centers for Disease and Control and Prevention said on Thursday.