Donald Trump wore a face mask in public for the first time during a visit to a military hospital on Saturday evening. 
'When you’re in a hospital, especially … I think it’s expected to wear a mask,' the US president said as he left the White House in a helicopter to visit Walter Reed National Military Medical Center in suburban Washington DC to meet wounded service members and healthcare providers caring for Covid-19 patients.
Coronavirus cases have surged to record levels in the US, with guidelines recommending the wearing of face masks in certain circumstances to stop the spread of the virus
 Donald Trump wears mask in public for first time during Covid-19 pandemic