IB program aims to form 'students of the world'(视频)
Man who found California gold died broke
Fewer children under the age of five are dying
Teens help revive California nature
'War of 1812' flag still inspires after 200 years
US ambassador killed in Libya
After long fight, DC wins right to a statue in the Capitol Building
Easing pain in the sick and dying
Somalis in US optimistic about changes back home(视频)
Despite recession, blow-dry bars heat up
Tensions rising again over Iran's nuclear program(视频)
US beefs up security after embassy attacks(视频)
English settlers establish colonies In the New World
CPJ: Journalists need new ways to stay safe
National 9/11 museum at standstill as anniversary nears
Sea life color codes food to evade danger
Nokia, Microsoft promote new phones
US firms prospering in Asia, Russia(视频)
Apollo 13: 'Houston, we've had a problem here'
Carlsbad Caverns National Park in New Mexico
American's first exchange students from China
Tree deaths linked to climate change
US automakers bet billions on Russian car boom
Reality of mormon life more complex than Romney image(视频)
Men face higher death risk, but why?
New heart stents better than old ones, study says
Designing an alternative to antibiotics
Vietnamese-American doctor helps rebuild bodies, lives(视频)
Cancer drug finds HIV hidden in the body
Driving with GPS can be difficult to navigate