The Israeli military said Monday that it can now fly over the country's capital, Tehran, without facing major resistance after crippling Iran’s air defenses in recent strikes, enabling Israel to hit an expanding range of targets with relative ease.

Israel stunned Iran last week with an intelligence and military operation years in the making that struck high-level targets with precision.

The Iranian military's new head of emergency command was killed in an Israeli Air Force strike only four days after his predecessor was killed in the initial hours of Israel's strikes targeting Iran's nuclear program.

Iran and Israel continued to exchange attacks into Monday amid the latest round of conflict between the two nations.

As Israel pounds Iran with airstrikes targeting military facilities and its nuclear sites, officials in Tehran have proposed a variety of steps the Islamic Republic could take outside of launching retaliatory missile barrages.

Israel and Iran have begun a new round of attacks, as the conflict between the two heavily armed rivals enters its fourth day.

Israel said Tuesday that they killed Iran’s wartime chief of staff Maj. Gen. Ali Shamdani, a close ally of Iranian Supreme Leader Ayatollah Ali Khamenei.

An Israeli official said that "there's never a 100 percent guarantee," but "a nuclear disaster" should "not happen."

Regime change in Iran could be a result of Israel's military attacks on the country, Israeli Prime Minister Benjamin Netanyahu told Fox News on Sunday, saying Israel would do whatever is necessary to remove the "existential threat" posed by Tehran.