Around 50% of ballistic missiles fired by the Houthi group in Yemen have failed since the resumption of fighting, according to Israeli officials. The low number of sirens activated in Israel is attributed to technical difficulties in the failed missiles and the American THAAD system and Israel's Arrow 3 system. Israel, the United States, and partner countries have been closely cooperating to intercept Houthi projectiles and counter regional threats. The US has continued airstrikes against Houthi targets in Yemen, and Sunday's missile launch coincided with indirect discussions between the US and Iran over Iran's nuclear program. Israel and the US operate a layered missile defense system, including the Arrow 3, Arrow 2, THAAD, and AEGIS systems.