NEW: United places largest widebody order in US history

United Airlines has broken aviation records by inking a blockbuster deal for at least 100 new Boeing twin-aisle jets. The US carrier has placed a firm order for 100 new 787 Dreamliners, along with options for a further 100 examples. The combined deal is the biggest widebody contract by an American operator in the history of commercial aviation. According to the OEM, United will be able to choose from the full range of 787 models, from the smallest -8 through