Teens help revive California nature

'War of 1812' flag still inspires after 200 years

The Occupy Movement turns one

Carlsbad Caverns National Park in New Mexico

CPJ: Journalists need new ways to stay safe

Somalis in US optimistic about changes back home(视频)

English settlers establish colonies In the New World

Man who found California gold died broke

Cancer drug finds HIV hidden in the body

Chinese invest in Italian soccer club(视频)

US drought renews debate on biofuel

US beefs up security after embassy attacks(视频)

American's first exchange students from China

Scientists seek HIV vaccine using monkey model

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

US automakers bet billions on Russian car boom

Mideast protests spark debate over free speech, religion(视频)

Dire warnings issued on diminishing Arctic ice(视频)

Words and their stories: Let's do business

Nokia, Microsoft promote new phones

Men face higher death risk, but why?

Touring colleges, without ever leaving home

After long fight, DC wins right to a statue in the Capitol Building

Driving with GPS can be difficult to navigate

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

Protests spread over anti-Islam video

To avoid humans, tigers take night shift

Uneven signs of growth in the transport industry

Tree deaths linked to climate change

Worries about rising food prices may ease