Detail of the Peacekeeper missile's "post-boost vehicle."
The post-boost vehicle consists of a liquid-propellant engine, powered by
hydrazine and nitrogen tetroxide (presumably fed by the green and tan tanks),
and used to provide velocity and attitude correction; a deployment module,
which is the structural support for the warheads; and the reentry system,
consisting of up to 10 cone-shaped independently-targetable reentry vehicles
containing the warheads (MIRVs).
The warheads are covered by a protective shroud (fairing), which protects the
reentry vehicles during ascent.