An official website of the United States government

Here's how you know

Official websites use .mil

A .mil website belongs to an official U.S. Department of Defense organization in the United States.

Secure .mil websites use HTTPS

A lock () or https:// means you’ve safely connected to the .mil website. Share sensitive information only on official, secure websites.

Hydration in the 21st century

OSAN AIR BASE, Republic of Korea -- Staff Sgt. Klaudyna Polewacz, 51st Aerospace Medical Squadron, takes a moment to rehydrate using the newly-issued M-50 protective mask during a base-wide exercise here July 22. Osan was the first base on the peninsula to issue the new masks. (U.S. Air Force photo/Staff Sgt. Scottie McCord)

Photo Details / Download Hi-Res

Hydration in the 21st century

Published July 22, 2008