In a move that signals a heightened state of global nuclear surveillance, a highly specialized Boeing WC-135R Constant Phoenix, famously known as the "nuclear sniffer," took off from Offutt Air Force Base in Nebraska on Thursday morning heading toward Europe. The Constant Phoenix is designed with a singular, critical mission: to sample the atmosphere for radioactive particles and gases that would indicate a nuclear explosion has occurred. A Message to TehranThe arrival of the nuclear sniffer in Europe coincides with a series of stern warnings from both Washington and Jerusalem. As Netanyahu noted, while the U.S. remains in constant contact with Israel, the final decisions on how to handle the Iranian nuclear threat remain with the American leadership. The deployment of the Constant Phoenix ensures that those decisions will be based on the most accurate and immediate atmospheric data available.