About the video: The Paris Air Show is one of the most extensive displays of aviation and aerospace in the world. The commercial aircraft industry comes to sell the latest technology to anyone who can afford it. U.S. defense contractors must balance making profits with maintaining national security.

At the Paris Air Show, crowds can get a close up look at a U.S. Air Force cargo plane. They can also see some of the latest in military technology such as the Global Hawk reconnaissance drone. The drone, made by U.S. Defense contractor Northrup Grumman, captures high-resolution images and can fly for 36 hours non-stop.

For America's allies there is more information sharing than ever before. The new F-35 Joint Strike Fighter was developed in collaboration with the United Kingdom, France, Germany and Italy.

These days it can be hard to differentiate friend from foe. Russia is not considered a U.S. ally or an adversary, but China is viewed as a potential adversary. Both countries are also at the Paris Air Show promoting their own military technology.