Millions of people in North America have been advised to wear N95 masks outdoors due to poor air quality levels sparked by intense wildfires in Canada. New York will begin distributing free masks on Thursday. Canada has said that people s...

  The World Health Organization (WHO) has changed its advice on face masks, saying they should be worn in public where social distancing is not possible to help stop the spread of coronavirus. The global body said new information showed they c...

  President Donald Trump is replacing US National Security Adviser HR McMaster with Bush-era defence hawk and former United Nations ambassador John Bolton. Mr Trump tweeted to thank Gen McMaster, saying he had done an "outstanding job &am...