There's a deal to curb Iran's nuclear capability, an agreement was reached after months of negotiations, that could thaw relations between Washington and Tehran after a 36-year freeze, though major hurdles remain. Josh Robin filed the following report.

After marathon negotiations and a busted deadline, a tentative pact between enemies.

"I am convincted that if this framework leads to a final comprehensive deal, it will make our country, our allies and our world safer," said President Barack Obama.

Safer, because the White House says Iran's nuclear program will be verifiably peaceful.

The White House says the number of Iranian centrifuges would shrink by two-thirds. Uranium enrichment would drop, though not entirely. The nation would be at least one year away from "breakout" to a bomb.

In exchange, sanctions would end, though not entirely. Iranian support for terrorist groups, presumably like Hezbollah, would have to first cease.

Final agreement is due June 30. The president says inspections would be "robust."

In Tehran, Iranians cheered the move, as did its foreign minister, Javad Zarif.

"What I hope is that through courageous implementation of this, some of that mistrust could be remedied, but that is for us all to wait and see," Zarif said.

Zarif also tweeted, "Found solutions. Ready to start drafting immediately."

But the Israeli prime minister, Benjamin Netanyahu, says the deal threatens his nation's security. Obama called Netanyahu Thursday afternoon.

"There will be no daylight, there is no daylight, when it comes to our support for Israel's security, and our concerns about Iran's destabilizing policies and threats toward Israel," Obama said.

But fresh from a visit to Israel, House Speaker John Boehner called the agreement "alarming." He's vowing a thorough review.

Arab leaders on the Saudi peninsula are also wary. They see Iran encroaching - in Yemen and Syria, to name just two places. This could spark a nuclear arms race.

Meanwhile, hard-line clerics in Iran may also need convincing. In many ways, they are the final word there, meaning this deal, though celebrated, is still quite fragile.