The UN currently has nearly 6,000 food trucks that could enter the Gaza Strip, but they are blocked, according to Philippe Lazzarini, head of UNRWA (the United Nations relief agency for Palestinian refugees).

Since Sunday, aircraft from Israel, Jordan, and the United Arab Emirates have been dropping food aid, while Germany, France, and Spain have done so since today. Belgium will also conduct airdrops.

However, he said air drops are"at least 100 times more expensive than trucks" which "carry twice as much aid as planes".

"If there's political will to allow airdrops—extremely expensive, insufficient, and inefficient—then there must be a similar political will to open the roads," he says, without explicitly mentioning Israel. Israel controls the access points to Gaza.