Sentry
... that the Sentry anti-ballistic missile was packed into a container that looked like an MX missile?
... that the <b id="mwqg"><a href="./Sentry_program" id="mwqw" rel="mw:WikiLink" title="Sentry program">Sentry</a></b> <a href="./Anti-ballistic_missile" id="mwrA" rel="mw:WikiLink" title="Anti-ballistic missile">anti-ballistic missile</a> was packed into a container that looked like an <a href="./LGM-118_Peacekeeper" id="mwrQ" rel="mw:WikiLink" title="LGM-118 Peacekeeper">MX missile</a>?