US beefs up security after embassy attacks(视频)

US drought renews debate on biofuel

Chinese invest in Italian soccer club(视频)

The Occupy Movement turns one

To avoid humans, tigers take night shift

Despite recession, blow-dry bars heat up

Refugee camps spread life-threatening diseases

Worries about rising food prices may ease

Carlsbad Caverns National Park in New Mexico

Tensions rising again over Iran's nuclear program(视频)

Scientists seek HIV vaccine using monkey model

Somalis in US optimistic about changes back home(视频)

US ambassador killed in Libya

The legal battle between Apple and SamsungDownloa

Reality of mormon life more complex than Romney image(视频)

Fewer children under the age of five are dying

Words and their stories: Let's do business

Indicators show US economic recovery slow, uneven

Turning industrial waste-heat into electricity

Driving with GPS can be difficult to navigate

Marylanders recall bloodiest day in US history

Teens help revive California nature

US firms prospering in Asia, Russia(视频)

Sea life color codes food to evade danger

Designing an alternative to antibiotics

IB program aims to form 'students of the world'(视频)

Nokia, Microsoft promote new phones

American history: Columbus discovers the New World

American's first exchange students from China

Learning First Aid: What to do until medical help arrives