An anti-missile system operates after Iran launched drones and missiles toward Israel, as seen from Ashkelon, Israel, April 14, 2024.Amir Cohen via ReutersThe US helped shoot down Iranian drones and missiles fired at Israel over the weekend.Ukraine's president said the response showed what could be done to protect his own country.But the White House said it wouldn't do the same for Ukraine, calling it a "different threat picture."The White House said on Monday that it would not shoot down drones for Ukraine, despite having done so for Israel over the weekend.Israel said that Iran fired more than 300 drones and missiles at it on Saturday night.