an Entity references as follows:
A ballistic missile goes through several distinct phases of flight that are common to almost all such designs. They are, in order: * boost phase when the main boost rocket or upper stages are firing; * post-boost phase when any last-minute changes to the trajectory are made by the upper stage or warhead bus and the warheads, and any decoys are released; * midcourse which represents most of the flight when the objects coast; and * terminal phase as the warhead approaches its target and, for longer-ranged missiles, begins to reenter the atmosphere.