The president ordered a board to probe a massive Russian cyberattack. It never did.

This article was originally published by ProPublica, a Pulitzer Prize-winning investigative newsroom. Sign up for The Big Story newsletter to receive stories like this one in your inbox.

After Russian intelligence launched one of the most devastating cyber espionage attacks in history against U.S. government agencies, the Biden administration set up a new board and tasked it to figure out what happened — and tell the public.

State hackers had infiltrated SolarWinds, an American software...