More than 200 people were killed and at least 450 injured in bomb blasts that ripped through churches and luxury hotels in Sri Lanka on Easter Sunday, the first major attack on the Indian Ocean island since the end of a civil war 10 years ago.
It has been 20 years since two Columbine students stormed Columbine High School. a suburban Denver school, armed with shotguns and semiautomatic weapons, fatally shooting 12 students and a teacher before committing suicide.
Chinese teenagers completed a tour of a space colony against a desolate backdrop at a Chinese-built Mars simulation base in the barren, windswept hills of Gansu province.
