Bangladesh, July 12 -- US President Donald Trump wore a mask for the first time in public during the pandemic while visiting a military hospital in suburban Washington on Saturday.

Trump flew by helicopter to Walter Reed National Military Medical Center to meet wounded service members and health care providers caring for COVID-19 patients.

Health officials recommended the facial covering for Trump as a precaution against spreading or becoming infected by the novel coronavirus.

As he left the White House, he told reporters: "When you're in a hospital, especially ... I think it's a great thing to wear a mask."

Trump was wearing a mask in Walter Reed's hallway as he began his visit. He was not wearing one when he stepped off the helicopt...