On the Egyptian front, Israel's attacks against Syria had served as a 'distraction' against the Egyptian offense. This allowed the Egyptian army to dig deeper into Sinai, around 12 km, an extra 2 km to the original 10 km plan. Israel feared a massive military defeat and so called on America for aid. Initially, America refused so Israel threatened to use its nuclear weapons, this threat was enough to persuade President Richard Nixon to send aid to Israel. America conducted "Operation Nickel Grass", which gave Israel a resupply of 20 tons of military equipment and ammunition. This vital to Israel and it allowed Israel to continue fighting . Henry Kissinger, However, this was later denied.