The prime minister is involved; so is the U.S. deputy secretary of State. The BBC is changing policies. But Bob Vylan remains steadfast.

After punk duo Bob Vylan chanted "death to the IDF" live on air, the BBC has vowed to take action to "ensure proper accountability" for those found to be responsible for the broadcast.

Organizers of the Glastonbury Festival said Sunday they are "appalled" by the onstage statements of the punk duo Bob Vylan, whose singer led the crowd in a series of chants including "Death, death to the IDF" and "Free Palestine" the day before.