President Trump wasn't just any visitor. That might explain why, when he traveled to a Michigan Ford plant repurposed to make ventilators for COVID-19 patients, he defied factory rules and refused to wear a mask when facing the media. "I wore one in the back area," Trump said, adding, "I didn’t want to give the press the pleasure of seeing it." Meanwhile, 77 Nobel laureates have requested a probe into the National Institutes of Health's recent cancellation of a $3 million grant to an American group researching coronaviruses in China. They argue that such work is vital for fighting the pandemic.