The blast doors are never to be left open if one of the crew members inside is asleep – as was the case in both these instances – out of concern for the trouble an intruder could cause, including the compromising of secret launch codes.
An investigative report by the Associated Press found that the most recent violations involving the blast doors were caused by the chronic cravings of launch control crews for delivery pizza. A launch control officer who wished to remain anonymous told AP that Domino's Pizza, which has a contract with Global Strike Command as its sole pizza supplier, requires that the blast doors remain open whenever an order is called in so that the company can fulfill its "30-minutes or it's free" guarantee.
The crews who operate the missiles are still expected to follow rules without fail, including the prohibition against having the blast door open when only one crew member is awake or when expecting a pizza delivery.
An unnamed missileer told AP that launch control officers often order multiple pizzas at a time and freeze them for later consumption in the event of a nuclear war after which they would be stuck underground for an indefinite time period. The officer said that, "There's nothing more comforting than the aroma of re-heated pizza after Armageddon."
A spokesperson for Global Strike Command said that the agency is reconsidering its relationship with Domino's, and is considering changing suppliers to Papa Murphy's Take 'N' Bake Pizza in order to avoid the problem with blast doors.
Editor's Postscript: Material that was plagiarized and embellished in this post was stolen from an article in The Guardian (http://www.theguardian.com/world/2013/oct/23/us-air-force-nuclear-missiles-blast-door).