We got fed "Heater Meals" on occasion recently during Katrina. Just about absolute crap. After living on Army rations for twenty years, maybe I'm biased towards MRE's, but I was NOT impressed with the heater meals.
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Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, a critter that can be killed but can't be tamed. --Robert A. Heinlein