Eli Lake with another monster scoop:
For much of the last decade, as Iran methodically built its nuclear program, Israel has been assembling a multibillion-dollar array of high-tech weapons that would allow it to jam, blind, and deafen Tehran's defenses in the case of a pre-emptive aerial strike.
A U.S. intelligence assessment this summer, described to The Daily Beast by current and former U.S. intelligence officials, concluded that any Israeli attack on hardened nuclear sites in Iran would go far beyond airstrikes from F-15 and F-16 fighter planes and likely include electronic warfare against Iran's electric grid, Internet, cellphone network, and emergency frequencies for firemen and police officers.
For example, Israel has developed a weapon capable of mimicking a maintenance cellphone signal that commands a cell network to "sleep," effectively stopping transmissions, officials confirmed. The Israelis also have jammers capable of creating interference within Iran's emergency frequencies for first responders.