Recently in testimony before a Senate hearing, Director of National Intelligence, James Clapper said that Iran might target the United States.

The top U.S. intelligence official, James R. Clapper, told a Senate hearing that a purported Iranian plot to assassinate a Saudi diplomat in Washington in the fall convinced U.S. officials that leaders in Tehran are increasingly likely to support bombings on U.S. soil, especially if they feel that their hold on power is threatened.
"Some Iranian officials, probably including supreme leader Ali Khamenei, have changed their calculus and are now willing to conduct an attack in the United States," said Clapper, director of national intelligence.
Tension with Tehran has risen sharply in recent weeks as the European Union and the Obama administration have imposed punishing economic sanctions in an effort to persuade Iran's leaders to abandon what they suspect is a nuclear weapons program.

In a similar vein, the New York Times reported the Deputy Prime Minister Moshe Ya'alon warned that Iran was trying to develop a long range missile capable of reaching the United States.

The Israeli, Moshe Yaalon, a deputy prime minister and minister for strategic affairs, said the blast at a missile base of Iran’s Islamic Revolutionary Guards Corps hit a system “getting ready to produce a missile with a range of 10,000 kilometers.”
…
Mr. Yaalon was trying to make the point that the Iranian nuclear program is a threat not only to Israel but to other nations, creating “a nightmare for the free world.” He said that it was a concern to Arab states as well as to the United States and Israel.
American officials said they believed that Mr. Yaalon’s assertions were at best premature, and at worst badly exaggerated.

The article was rewritten and now carries the headline, U.S. Plays Down Warning By Israeli Over Iran’s Missile.