National security advisor says Iranian efforts to move equipment below ground not surprising. IDF chief of staff says there are possible “negative developments on the horizon and that can bring about action.”

National security advisor Tzachi Hanegbi on Tuesday said a new nuclear facility being built by Iran would not be immune from attack, despite assessments by experts it will be beyond the reach of last-ditch U.S. bunker-busting bombs.

Tzachi Hanegbi made the comments in response to an Associated Press report that said the new facility appears to be as deep as 100 meters (328 feet) below ground.