All passengers are feared dead after an American Airline jet carrying 60 passengers and four crew members and a U.S. Army helicopter with three soldiers onboard collided midair late Wednesday. President Donald Trump is widely expected to impose tariffs on goods from Mexico and Canada as early as February 1 as part of a plan he says will boost the U.S. economy. Researchers at the University of Warwick are using a prototype headset to investigate the use of olfactory stimuli in a virtual racing game, allowing players to smell the burning rubber of car tires.