Why the Gaza ceasefire failed to materialize

US President Donald Trump called it "potentially one of the greatest days ever in civilization" as he laid out his administration's 20-point plan to end the war in Gaza. Nine months later, Israeli strikes have killed over 1,000 Palestinians; most of the population still lives in tents; and Israel is slowly taking over more territory as Hamas refuses to disarm. So why hasn't Trump's peace plan become a reality in Gaza? CNN's Jeremy Diamond explains.