Revealing mistake: When ice is shedding from the plane's wings, the chunks slowly slide forward and then down the leading edge. Loose chunks should have flown off rapidly to the rear due to the airflow.
Revealing mistake: During the first aerial search scene, at a point which is supposed to be deep into uncharted territory, a snow-covered road can be prominently seen skirting the shore of a big lake.
Answer: Because after eating it as part of their rations throughout WWII, many ex-GIs swore to never touch the stuff.