It's less than a week since the release of the remaining living Israeli hostages and the deal between Israel and Hamas is already being tested, with Israel carrying out airstrikes after accusing Hamas of violating the ceasefire.

That a ceasefire had been reached at all was a big surprise. It followed months of failed attempts to end the two-year war in Gaza, triggered by Hamas' Oct. 7 attack.

The breakthrough came after President Trump deputized not two diplomats to move the negotiations along, but two businessmen: one, a close friend, Steve Witkoff, the other his son-in-law, Jared Kushner – dealmakers who came up through the world of New York real estate.

Lesley Stahl: I heard the president asked you what the chances were for success.

Jared Kushner: Yes.

Lesley Stahl: And you said?

See Full Page