The AGM-158 JASSM (Joint Air-to-Surface Standoff Missile) is a low observable standoff cruise missile developed in the United States. It is a large, semi-stealthy long-range weapon of the class. The missile's development began in 1995, but a number of problems during testing delayed its introduction into service until 2009. The JASSM is now entering service with a number of foreign nations as well, which are Australia and Finland. An extended range version of the missile, the AGM-158B JASSM-ER (Joint Air-to-Surface Standoff Missile-Extended Range), is under development and is expected to deploy in 2013.