Sen. Mark Warner says he is particularly disturbed about how Instagram's algorithm appears to be promoting vaccine misinfo.

Facebook says it took down about 400 Instagram accounts and worked with TikTok and Twitter to help them crack down, too.

It's part of an effort to show Facebook can regulate itself.

A range of U.S. tech firms now are using court orders to curb apparent scamers.

The 29-year-old Russian entered the U.S. in January with $20,000 in cash. The FBI says he is a “significant cybercriminal" with links to the QQAAZZ group.

This disclosure comes days after U.S. military officials publicly admonished foreign governments for exploiting the pandemic to fan anti-American sentiment.