BOSTON (CBS) – A survivor of the Boston Marathon bombings has made a major milestone.

Celeste Corcoran, who lost both legs in the attacks, took her first steps using prosthetics.

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Celeste and her daughter Sydney were both injured when the bombs went off near the finish line of the Boston Marathon on April 15.

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Celeste walked across the hallway and back again right after she was fitted with her prosthetics on Monday. Video of their recovery has been posted to their Facebook page.

Donate: Celeste and Sydney Fund

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Sydney suffered severe injuries after being hit by shrapnel. Last week, she was crowned Prom Queen.