 In response to the actions by the U.S. towards space weaponization, the Chinese started a space defense program that included anti-satellite defense.The Chinese anti-satellite system has been named by the Director of the Defense Intelligence Agency, Lieutenant General Michael Maples, in a Senate Armed Services Committee Hearing as the SC-19.The SC-19 has been described as being based on a modified DF-21 ballistic missile with a Kinetic Kill Vehicle mounted.