An unidentified classmate of Indian-born astronaut Kalpana Chawla offers tributes in Delhi. Chawla was among the seven astronauts who died when Columbia, the oldest in NASA's shuttle fleet, disintegrated at an altitude of about 61,000 metres (200,000 feet) over eastern Texas and Louisiana.

Remembering Kalpana | A Journey to Remember

The Columbia Tragedy: The Full Coverage

Photos: Prakash Singh/AFP/Getty Images

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