US President Donald Trump has signed an order doubling tariffs on steel and aluminium imports from 25% to 50%. The move hikes import taxes on the metals, which are used in everything from cars to canned food, for the second time since March.

U.S. tariffs are in the spotlight once again in Europe as President Donald Trump's 50% levy on steel and aluminum imports came into effect Wednesday.

U.S. President Donald Trump has promised to hike nearly all of his tariffs on foreign steel and aluminum to a punishing 50% on Wednesday, a move that would hammer businesses from automakers to home builders,