Doc does the unthinkable (at least for him)

World War II: Combat Medics http://hubpages.com/hub/World-War-II-Combat-Medics

In most armies, medics wear specific insignia, with a prominent Red Cross on a white background. Islamic countries use a red crescent instead while Israeli medics wear the Magen David Adom (a red star of David on a white background). These symbols signify to enemy soldiers that the medic is a noncombatant, providing medical care. For many years, most medics have carried at least a side arm like the handgun and knife (and now, frequently a rifle, carbine or submachine gun), to be used as a defensive weapon. Medical personnel may be armed, but may only use their weapons to protect themselves or the wounded and sick in their care. If they use their arms offensively (i.e. attacking or assaulting), or carry arms that qualify as offensive (such as a sniper rifle, machine gun or grenade launcher), they then sacrifice their protection under the Geneva Conventions. Generally, a medic holding his/her weapon is considered to be an armed, military threat. According to the Geneva Convention, knowingly firing at a medic wearing clear insignia is a war crime.