Pirates Sequel Raids Memorial Day Weekend Treasure Chest.... Pirates Of The Caribbean: At World'S End has broken the U.S. box-office record for best Memorial Day weekend debut, after making $142.1 million (£71.05 million).The second sequel scored $115.1 million (£57.55 million) between Friday (25May07) and Sunday (27May07), falling short of last summer's (06) $135.6 million (£67.8 million) opening weekend take for Pirates sequel Dead Man's Chest.However, At World's End beat last year's (06) four-day Friday to Monday Memorial Day weekend opening record, which was set at $122.9 million (£61.45 million) by X-Men: The Last Stand.