US President Donald Trump today said, he had ordered more robust extreme vetting of travellers coming into the US. In the aftermath of the first deadly terror attack in New York since the September 11, 2001 carnage, Trump tweeted that he ordered Homeland Security to step up US's already extreme vetting programme.<br/><br/>At least eight people were killed and 11 others injured in Lower Manhattan on Tuesday after a gunman in a truck ploughed through a busy bike path, an incident the US termed as an act of terrorism.