The Trump Presidency: Trump signs controversial steel proclamations

US President Donald Trump has imposed heavy tariffs on steel and aluminium imports - but will spare some countries. The White House says the measures will boost US industries but the move has sparked fears of a global trade war. Harry Horton reports. Subscribe: http://trt.world/subscribe Livestream: http://trt.world/ytlive Facebook: http://trt.world/facebook Twitter: http://trt.world/twitter Instagram: http://trt.world/instagram Visit our website: http://trt.world