The War: Eyes in the Sky

Measuring the flow of North Vietnamese men and materiel into South Viet Nam is no easy task. The most telling evidence arrives at the Pentagon and the White House in the form of sharp, 9-in.-square photographs ferried by Air Force courier planes from Asia each day. The pictures, showing Ho's men on the move, are the product of the most sustained, highly sophisticated aerial surveillance in military history.

Day in, day out, U.S. photo jets streak over North Viet Nam and Laos, filming huge patches— and tiny pockets— of jungled land, searching...

Want the full story?

Subscribe Now

Subscribe
Subscribe

Get TIME the way you want it

  • One Week Digital Pass — $4.99
  • Monthly Pay-As-You-Go DIGITAL ACCESS$2.99
  • One Year ALL ACCESSJust $30!   Best Deal!
    Print Magazine + Digital Edition + Subscriber-only Content on TIME.com

Learn more about the benefits of being a TIME subscriber

If you are already a subscriber sign up — registration is free!