Tank A Day Adventure - M1A1 Abrams: At the onset of Memorial Day weekend, I rode to the Collings Foundation's, newly-opened American Heritage Museum and spent some time photographing and obtaining information on each exhibit. Below is the 37th of these, an American M1A1 Abrams Main Battle Tank. The M1A1 is currently America's main battle tank. It weighs 67.6 tons and is powered by a 1,500 hp Honeywell AGT100C multi-fuel gas turbine. The M1A1 has a crew of 4, can travel 45 mph on road or 23 off with a range of 288 miles. It has Chobham composite armor equivalent to 23" to 51" thick with a 120 mm. gun. Some 10,28 have been built from 1980 to present. The M1A1 saw action in the Gulf War and the war in Iraq. Designed for more open warfare, the M1A1 easily destroyed Iraq's tank force during the Gulf War. It also easily ran over enemy defenses during the Iraq War; however, it was more vulnerable in urban combat until the Tank Urban Survival Kit (i.e., TUSK) was added to give protection to the sides and rear of the tank.