Over the weekend, Iran’s chief nuclear scientist, Mohsen Fakhrizadeh, was assassinated. Iranian officials have blamed Israel, which appears to be behind the operation. Who was Fakhrizadeh, and what impact will his death have on Iran’s pursuit of nuclear weapons, U.S. foreign policy in the presidential transition period, and the incoming Biden administration’s approach to Tehran? Dr. Raz Zimmt addresses these and other pressing questions.