NORWALK - Doctors say that life-saving techniques learned by working in war zones may have helped save lives during the Boston Marathon bombings.

For example, top-level emergency rooms in Boston currently use blood transfusion techniques learned in Iraq and Afghanistan. Doctors have also learned more about blood clotting and how best to regulate blood pressure during wartime.

Experts say that victims may have also been saved because the explosions took place so close to three of Boston's top trauma centers.