Here's what you may have missed this week on 60 Minutes.The coronavirus variants experts are most concerned aboutProsecutor Kim Gardner's fight to reform the St. Louis justice systemNew Orleans' St. Augustine High School Marching Band, the self-proclaimed "Best Band in the Land"Inside 60 Minutes' first report on COVID-19Marking ten years since the 2011 Japan earthquakeConvalescent plasma research featured on 60 Minutes shows promise in new scientific studyAn update on the SolarWinds hack and data breachHealth care workers facing a mental health crisis