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Israel was able to track the movements of key Iranian figures and assassinate them during the 12-day war this spring by following the cellphones carried by members of their security forces.

By Farnaz FassihiRonen Bergman and Mark Mazzetti

Farnaz Fassihi and Ronen Bergmen have led coverage on the shadow war between Iran and Israel and investigated assassinations and covert operations on sea, land, air and in cyberspace. Mark Mazzetti has covered security topics for more than two decades.