from under her and begin working on her, too. she was basically in arrest at the time. we thought we had a faint pulse. we started cpr we weren't sure of the pulse. we started using an ambu bag and transferred to the medical tent where unfortunately she expired. >> bill: she went into cardiac arrest. did she have other injuries from the bombings? >> she had injuries on the lower extremities but no obviously injury to her chest or abdomen. there was no evidence of shrapnel wounds in her chest in a cursory exam that we did. it was kind of puzzling. i don't know it was the blast effect or what that caused the arrest. >> bill: you are an emergency room physician. when you are on the job, you are prepared for people coming to