Israel’s historic strike on Iran revealed years of Mossad activity inside the country, including hidden weapons, drones and assassinations of nuclear officials.

Israel’s military said Friday it had detected dozens of missiles launched from Iran and was working to intercept them. Residents were told to get into shelters and not leave without an official all-clear.

The targeting of leaders and sensitive sites relied on activating intelligence teams, pre-positioned weapons and other capabilities that had long lain dormant.

Israel launched widescale strikes against Iran on Friday, saying it targeted nuclear facilities, ballistic missile factories and military commanders and that this was start of a prolonged operation to prevent Tehran from building an atomic weapon.

The military strikes jolted investors, raising concerns that a broader Mideast conflict would disrupt the world’s energy supplies.

Mohammad Pakpour's statement follows the death of his predecessor, General Hossein Salami, in Israel's strikes on Friday.

In response to Israel’s attack, Iran fired back with more than 100 drones. NBC News’ Chief International Correspondent Keir Simmons reports more. Former NATO Supreme Allied Commander retired Gen. Wesley Clark and Senior Fellow at the Carnegie Endowment for International Peace Aaron David Miller join Ana Cabrera to examine the possibility of further attacks.

Israel’s attacks on Iran renewed fears of war between the countries and immediately threatened the region’s economy.