A group of military and manufacturing experts teamed up to create a new type of face mask with a swappable filter, and it could help alleviate shortages for workers returning to their jobs

· The coronavirus crisis has prompted many companies and individuals to pivot their businesses or start new companies to help those in need. 
· Building Momentum, a training organization based in Alexandria, Virginia, saw its business grind to a halt when the crisis hit: Its employees couldn't travel or host in-person...