More than a hundred Israeli fighter jets took part in a major military exercise this month.
The exercise was likely a drill for an attack on Iran's nuclear facilities, U.S. officials told The New York Times.
The Times reports that Israel carried out the maneuvers over Greece and the eastern Mediterranean. The mission included refueling tankers and helicopters to rescue downed pilots.
The distance traveled was more than 900 miles, which is roughly the distance between Israel and Iran's main nuclear plant, U.S. sources say.
"Israel has been talking about this possibility for a long time, that it would not take an Iranian nuclear weapon lying down. And it has been practicing the operation or operations for a long time," Israeli military analyst Martin Van Creveld of Jerusalem's Hebrew University said.
Israel's military refused to comment on the report.
But two weeks ago, Former Defense Minister Shaul Mofaz told an Israeli newspaper that if Iran continues its nuclear weapons program, "We will attack."
"They wanted us to know, they wanted the Europeans to know, and they wanted the Iranians to know," a Pentagon official reportedly said. "There's a lot of signaling going on at different levels."
Several U.S. officials reportedly told the Times that Israel had not made any final decisions on attacking Iran.
But Iran, apparently, isn't taking any chances.
The Times quoted a U.S. official, "They are clearly nervous about this and have their air defense on guard."
Source: The New York Times, The Jerusalem Post