Shehada Hijazi woke at dawn. It was his best chance, he thought, to get his hands on a package of food at a new distribution site run by a U.S.- and Israeli-backed foundation in the Gaza Strip. Hijazi described what he called 15 minutes of terror Thursday at the center run by the Gaza Humanitarian Foundation, the private contractor that Israel says will replace the U.N. in feeding Gaza's more than 2 million people.