Scientists zoom in on carbon dioxide in cities   Watson, 2 others tied for lead at dramatic Open   White House sees GDP showing signs of progress   Astronauts deal with flooded toilet in orbit   Soldier held in Afghanistan is 23-year-old Idahoan   Westwood leads at the turn of dramatic Open   Al Rajhi Bank Achieves SR 3.5 Billion in Profits During the First Half of This Year, a 5% Increase Over Last Year   Lost British backpacker says he was 'total idiot'   China says recent Urumqi unrest was premeditated   Boston Globe union to vote again on new contract   Alberto Contador takes yellow jersey after 15th stage of Tour de France.   Astronauts focus on robotic work in orbit   Astronauts focus on robotic work in orbit   'Potter' conjures up $159.7 million in 5 days   Kurds in troubled Iraqi province threaten to secede   Turkey extends smoke ban to bars, restaurants   Westwood grabs British Open lead with eagle   Civilian helicopter crash in Afghanistan kills 16   "Harry Potter" tops North American box office   Fisher takes quad, Watson back into tie for lead