Israel's strike on Iran's S-300 missile system in April deterred Iran and Hezbollah from launching large-scale attacks in August, according to sources. Iran has not retaliated directly against Israel for the assassination of Hamas chief Ismail Haniyeh, and sources believe Iran's Supreme Leader felt the strike on the S-300 was a significant loss. The strike was significant because it was a huge jump in anti-aircraft capabilities and was located near Iran's Natanz nuclear facility and a key military airport. Israel's offense and defense in April and its preemptive strike on Hezbollah in August have likely ended or significantly pushed off the intentions of Israel's enemies to attack in August.