From here:

Speaking at a Likud meeting Monday afternoon, Prime Minister Binyamin Netanyahu expressed concern that aircraft flying near the Gaza Strip may be exposed to anti-aircraft systems.

“Today we are experiencing difficulty flying near the Gaza Strip since they have in their possession anti-aircraft missiles,” explained Netanyahu. “Imagine that there are no security arrangements, and there will be missiles that can take down an aircraft that is en route to Ben Gurion airport.”

Surely all of the $400 million from the US in Gaza aid went to buy food. Perhaps the missile launchers are firing potatoes.