4/26/2020: On The Line, Outbreak Science, The Unseen Enemy

Temperatures are being checked before shifts at GM and workers at Ford have watches that notify them if they're too close to each other. Norah O'Donnell reports on how both companies are trying to protect their employees as they manufacture medical equipment. David Martin finds out how the military is handling the coronavirus pandemic. And Bill Whitaker reports on the role of artificial intelligence in fighting the pandemic. Those stories on tonight's "60 Minutes."