The UGM-133A Trident II, or Trident D5 is a submarine-launched ballistic missile (SLBM), built by Lockheed Martin Space in Sunnyvale, California, and...

of the targets remains classified. The Trident was built in two variants: the I (C4) UGM-96A and II (D5) UGM-133A; however, these two missiles have little...

follows the START I treaty, which expired in December 2009; the proposed START II treaty which never entered into force; and the START III treaty, for which...