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An injured man is loaded into an ambulance after two explosions during the 117th Boston Marathon near Copley Square on Monday.
The carnage at the Boston Marathon bombing had many observers saying it looked like a war zone. Medical advances from the battlefields in Iraq and Afghanistan have actually been crucial in helping victims of the Boston blasts.
Here to tell us more about how military medicine has is being used is Doctor David Dromsky, an orthopedic surgeon at the Naval Medical Center in San Diego.