JASSM program began production in 1998 and was declared operational in 2003. In 2006 an extended-range variant, known as '''JASSM-ER''', underwent its first test in 2006, and the initial batch was delivered to the U.S. Air Force in March 2014. | JASSM program began production in 1998 and was declared operational in 2003. In 2006 an extended-range variant, known as '''JASSM-ER''', underwent its first test in 2006, and the initial batch was delivered to the U.S. Air Force in March 2014. |