A U.S. House Committee for Oversight and Reform hearing on the Arizona election review exploded into fireworks after a Maricopa County election official admitted that the county officials effectively deleted election data from materials turned over to auditors after receiving a legal subpoena from the Arizona Senate.

The site's torrid week shows what a challenge moderation has become for big tech firms.The news: YouTube announced new rules around hate speech on Wednesday that prohibit videos promoting Nazi ideology or denying the existence of the Holocaust or other well-documented violent events like the shooting at Sandy Hook Elementary School.