V bomber
... that during the Cuban Missile Crisis, each of Britain's "V force" squadrons kept one nuclear-armed V bomber and crew at 15 minutes' readiness?
... that during the <a href="./Cuban_Missile_Crisis" id="mwAxE" rel="mw:WikiLink" title="Cuban Missile Crisis">Cuban Missile Crisis</a>, each of Britain's "V force" squadrons kept one nuclear-armed <b id="mwAxI"><a href="./V_bomber" id="mwAxM" rel="mw:WikiLink" title="V bomber">V bomber</a></b> <i id="mwAxQ">(<a href="./Avro_Vulcan" id="mwAxU" rel="mw:WikiLink" title="Avro Vulcan">Avro Vulcans</a> pictured)</i> and crew at 15 minutes' readiness?