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Officials say New Orleans is better protected(视频)

Feed the soil, feed the crops

How to win a debate, Presidential or otherwise

《霍比特人3》电影精讲

FTC takes on computer scareware scammers

Cheating scandal threatens Harvard's image

Words and their stories: Fall guy

Maryland man is real hero behind 'Argo'

Refugee camps are a breeding ground for disease

Student street clinic helps homeless(视频)

Early detection and treatment a must for glaucoma patients(视频)

Colonizing expands in the American Northeast

Number of Chinese students in US dramatically expands

Clowning around; making magic; hair care for less

William Shakespeare: Star of stage and screen

Demand for wheat growing in Sub-Saharan Africa

United Nations report urges

Rare fungal meningitis outbreak in United States

Unusual Mars rock surprises rover scientist

Several US States to let voters decide same-sex marriage(视频)

Effort underway to boost US voter participation(视频)

Research grows through citizen science

Apollo's final missions: The last footsteps on the moon

American history: A new world clash of cultures

South pacific islands now totally powered by the sun

Femen's topless protest tactics hit Paris(视频)

Conflict presses Syrian economy

Many millions suffer from depression

Schwarzenegger becomes policy analyst(视频)

Seattle, 'City of Clocks' keeps on ticking