If Discovery isn't flying by then, it will have to get in line behind a Russian Soyuz rocket that's set to blast off March 26 with a fresh space station crew.

如果到时发现号还没有上天的话，发现号将不得不在预定于三月26日俄罗斯发射的联盟号火箭上天后才能升空。联盟号主要是运送新一轮空间站工作人员上天。

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John Berman fills in the time line leading up to the blast and immediately afterwards.

约翰·伯曼冲过终点线导致随后的爆炸。

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He jumped into the icy blast, his static line unhooked.

他跳进冰冷的风，解下他的静止的线。

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Ovechkin, who was moved back to left wing from right wing before the game, was stopped on a blue-line blast.

WSJ: Kovalchuk's OT goal gives Devils win over Capitals

Finally, she was able to call him to say she was safe and that her group had left the finish line just minutes before the blast to walk to a cafe for lunch.

NPR: Loved Ones Seek Word On Boston Runners After Blast

One employee, Silvia Hernandez, recounted how she was finishing up her workday at another building and standing in line to clock out when she heard a blast.

CNN: February 1, 2013 -- Updated 1937 GMT (0337 HKT)