U.S. President Donald Trump said it was an "historic day" as he headed back from Israel to celebrate the ceasefire deal. In an address to Israel's parliament, he urged lawmakers to seize a chance for broader peace in the region. In Egypt, he and other world leaders gathered to set the trickier parts of the deal into motion.

Trump’s plan holds out the possibility of a Palestinian state, but only after a lengthy transition period in Gaza and a reform process by the internationally recognized Palestinian Authority. Israeli Prime Minister Benjamin Netanyahu opposes Palestinian independence. Trump made no mention of a two-state solution at the summit.

"A lot of people like the one-state solution, some people like the two-state solution. We'll have to see. I haven't I haven't commented on that," Trump told reporters aboard Air Force One.

On Monday, the fragile ceasefire in Gaza led to freedom for Israeli hostages and the release of Palestinian prisoners held by Israel. It was the culmination of a long and tortuous process — but it may, in the end, have been the easier part.

The coming weeks, months and years will require more than just rebuilding from the devastation that has left much of Gaza in ruins.

Key details of the peace plan may remain unsettled.

Granular details will need to be negotiated to keep the plan moving forward and prevent the resumption of fighting.

The path to long-term peace, stability and eventual rebuilding will be a long and very precipitous route.