Just before an Israel-Hamas ceasefire went into effect Friday, which is the first step in implementing phase one of President Trump's peace plan to end the war in Gaza , senior U.S. officials shared a timeline of the months-long effort to put the deal together.

At this point, Israeli troops have withdrawn from parts of Gaza, initiating a 72-hour countdown for Hamas to release all remaining Israeli hostages. In exchange, Israel will release dozens of Palestinian prisoners and allow aid to flow into Gaza. Palestinians who left northern Gaza during fighting there could be seen returning to the war-ravaged area Friday.

The vast majority of Mr. Trump's 20-point plan remains to be implemented, but as the work of fulfilling it begins, here's what senior U.S. officials have told CBS

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