Iran live updates: Trump details risky, rejected plan to collect 'nuclear dust'

Speaking to reporters from the Oval Office on Thursday, President Donald Trump, for the first time, detailed a risky plan that he opted not to greenlight that would have sent U.S. troops into Iran to collect enriched uranium, or "nuclear dust" as he calls it.

The president said he decided not to go forward with the plan given the dangers.

Trump said the operation would have taken at least two weeks and also talked about the "massive equipment" that would need to be airlifted in.

The president added that the U.S. could still carry out such an operation, but also said that there's "no reason to" because the nuclear material is "entombed."

"We could get it right now," Trump said. "I don't think they could stop us if we wanted, but there's no reason to. It's entombed."

-ABC News' Nicholas Kerr and Michelle Stoddart

When asked what his red line for restarting military action with the war with Iran and whether that line for him is the killing of American troops, President Donald Trump said that such an action would be a "very good reason" to restart the war.

Trump also said he would be open to meeting Iranian Supreme Leader Ayatollah Mojtaba Khamenei, claiming that some have suggested such a meeting.

"I don't want to meet. But if I did meet, I'd be honored to meet him," Trump said. "I'd like to see if we make a deal. But if we make a deal, it's possible that I would meet him. I'd be OK with that."

-ABC News' Nicholas Kerr and Michelle Stoddart

Israel's Foreign Ministry responded to Hezbollah's rebuke of the ceasefire between Israel and Lebanon, saying that Hezbollah needs to be disarmed.

"Hezbollah leader Na'im Qassem's rejection of the ceasefire and rocket interceptions over Kiryat Shmona tell the story: Hezbollah continues to attack Israel and destabilize the region. The Iranian proxy Hezbollah must be disarmed and its terrorist infrastructure in southern Lebanon must be dismantled according to UN Security Council Resolution 1701," the ministry said in a statement Thursday.

Hezbollah leader Naim Qassem rejected the ceasefire between Israel and Lebanon in a statement read on TV on Thursday, saying "as long as the occupation exists, the resistance will continue."

Describing the negotiations between Lebanese authorities and Israeli part as "absurd, humiliating, and shameful" Qassem said that the negotiations are "completely rejected by broad segments of the Lebanese people."

He added that the agreement's demand that Hezbollah should leave southern Lebanon while it is under fire would mean "surrender, defeat and achieving the enemy's goals."

"The ceasefire must be comprehensive, with no separation between the south and the rest of Lebanon, and no freedom for the Israeli enemy to kill in Lebanon. As long as the occupation persists, the resistance will continue," Qassem said.

"The Washington Declaration is a roadmap for the annihilation of a segment of the Lebanese people and the enslavement of the rest. To pursue a security track under the guise of a fictitious ceasefire is like the devil's dream of entering paradise," he said.

He thanked Iran for helping Lebanon to reclaim its "land and rights" despite its own confrontations.

-ABC News' Ghazi Balkiz