From: HowStuffWorks on Fri, Dec 18 2009 2:25 AM

From: HowStuffWorks on Fri, Dec 18 2009 1:06 AM

From: HowStuffWorks on Tue, Sep 29 2009 5:18 PM

Military operations can be severely affected by weather conditions. On Discovery Channel’s "Best Evidence," activists theorize that the military is creating chemtrails with jets in order to modify the weather.

From: HowStuffWorks on Tue, Sep 29 2009 5:01 PM

Steel has been part of the military since the first armored tank rolled onto the battlefield. Learn how the military improves and creates harder steel that can handle today’s weapons on Discovery Channel's "HowStuffWorks" show.

From: HowStuffWorks on Tue, Sep 29 2009 4:55 PM

From the archives of Discovery: Each member of the U.S. military undergoes extensive training. Learn more about the military and military training.

From: HowStuffWorks on Tue, Sep 29 2009 4:51 PM

From the archives of Discovery: Each member of the U.S. military undergoes extensive training. Learn more about the military and military training.

From: HowStuffWorks on Tue, Sep 29 2009 4:51 PM

From the archives of Discovery: Each member of the U.S. military undergoes extensive training. Learn more about the military and military training.

From: HowStuffWorks on Tue, Sep 29 2009 4:51 PM

From the archives of Discovery: Each member of the U.S. military undergoes extensive training. Learn more about the military and military training.