Two-day war-games will involve 150 drones and will cover Iran’s Gulf coast and most of its territory.
"The US Justice Department has made allegations without providing valid evidence," Iran's Foreign ministry spokesman says.
Jake Sullivan says Iran to train Russian forces to use weapons, sessions to begin as soon as early July.
“Westerners do not help us, they hit wherever they can," says Khamenei in farewell meeting with Rouhani's administration.
Israeli officials have long threatened last-ditch military action against Iran if they deem foreign diplomacy a dead-end.