Besides Alaska, the USA has THAAD systems deployed in Guam and South Korea.
Though such exercises are planned months in advance, it comes after North Korea on Tuesday for the first time test fired an intercontinental ballistic missile capable of reaching parts of the United States including Alaska. The THAAD is based at the Pacific Spaceport Complex Alaska in Kodiak, Alaska, a Department of Defence official told CNN late Friday.
Pyongyang was heavily criticised after launching the missile.
The US Missile Defence Agency confirmed it aimed to carry out the test "in early July".
It is the first operational test of the Terminal High Altitude Area Defense (THAAD) to defend against a simulated attack, U.S. officials told Reuters news agency. In a recent Congress testimony, the former director of the MDA, Vice Admiral James Syring, stated that FTT-18 was meant to show the THAAD missile defense systems ability to target and hit a IRBM target that is separating.
"Each THAAD system is comprised of five major components: interceptors, launchers, a radar, a fire control unit and support equipment, according to Lockheed Martin, the security and aerospace company that serves as the prime contractor for the equipment". This statement from Beijing and Moscow accuses the US of using the threat from North Korea to expand their military presence in Asia, upsetting the region's balance of power.
Meanwhile in a show of force against North Korea, South Korea and the USA staged deep strike precision missile firing drills on Wednesday.
A truck carrying parts of US missile launchers and other equipment needed to set up the Terminal High Altitude Area Defense (THAAD) missile defense system arrive at the Osan base, South Korea.