The US Army says it's reviving a World War I practice — using soldiers as walking blood banks when helicopters can't fly

Fuente: Business Insider

tkUS Army National Guard photo by Staff Sgt. Sean Ferry, 114th Public Affairs DetachmentA recent US Army exercise looked at life-saving medical care when wounded troops can't be flown out. In an intense conflict, getting troops off the field or bringing in supplies could prove extremely difficult.