Know how difficult this is?

Shamelessly swiping this from David Bernstein's tweet: 

U.S. President & Secy of Ed: Re-opening schools this fall is simple, everybody just figure out common-sense solutions.

Actual nuclear scientists: Our supercomputers need more time to work the problem. pic.twitter.com/3XiYYebCgE

— David S. Bernstein (@dbernstein) July 18, 2020

You can find the full Albuquerque Journal article here, though the tweet captures the essential point.