Washington

US President Donald Trump promised "sweeping transformation" in the federal government's use of technology as he welcomed top executives from many of the world's largest tech companies to the White House.

The meeting on Monday brought leaders of an industry whose key figures have at times openly clashed with Mr Trump. But none of the executives criticised the president in public sessions, and Mr Trump projected a jovial mood, touting the gains in technology stocks since he took office and expressing confidence his administration would overcome such long-running challenges as modernising the air traffic system.