This is at 20 degrees Celsius, so it's a nice comfortable temperature at sea level, which is roughly about 760 miles per hour. Now if the temperature were to drop, so if temperature goes down, so does the speed of sound. And likewise, if the temperature goes up, the speed of sound goes up.
One single company won more than three-quarters of these funds, however, in a single contract win: Hellfire Systems. Hellfire, as we've discussed in the past, is the wholly owned Lockheed Martin (NYSE:LMT) subsidiary that manufactures Hellfire air-to-ground missiles for the military.
The development of the Hellfire Missile System began in 1974 with the U.S. Army requirement for a tank-buster, launched from helicopters to defeat armored fighting vehicles. Production of the AGM-114A started in 1982. The Hellfire II, developed in the early 1990s is a modular missile system with several variants.