Pageantry, protests to mark the start of Trump's U.S. presidency

Newly inaugurated U.S. President Donald Trump pumps his fist at the conclusion of his inaugural address during ceremonies swearing him in as the 45th president of the United States on the West front of the U.S. Capitol in Washington, U.S., January 20, 2017. REUTERS/Carlos Barria

WASHINGTON (Reuters) - Donald Trump took power as the 45th president of the United States on Friday and pledged to end what he called an "American carnage" of rusted factories and crime in an inaugural address that was a populist and nationalist rallying cry.

Striking a defiant tone, Trump said American workers have been devastated by the outsourcing of jobs abroad.