War is in the air. As most everybody knows by now, Russia has assembled a formidable force at various locations near Ukraine’s borders. Satellite images of military equipment and amateur video of lines of tanks convey the menace. Diplomats are talking but some are also withdrawing from the Ukrainian capital. Few are neutral or nuanced about the crisis.

Ngô Minh Hiếu was once a fearsome hacker who spent 7 1/2 years incarcerated in the U.S. for running an online store that sold the personal information of about 200 million Americans. Since leaving prison, Hiếu has become a so-called white hat hacker, attempting to protect the world from the sorts of cybercriminals he once was.