The threat to suspend the Camp David Accords, a cornerstone of regional stability for nearly a half-century, came after Prime Minister Benjamin Netanyahu said sending troops into Rafah was necessary to win the four-month-old war against the Palestinian terrorist group Hamas.

Over half of Gaza’s population of 2.3 million have fled to Rafah to escape fighting in other areas, and are packed into sprawling tent camps and U.N.-run shelters near the border. Egypt fears a mass influx of hundreds of thousands of Palestinian refugees who may never be allowed to return.