This story originally appeared in Los Angeles Times. The BBC issued a formal apology after broadcasting a controversial performance from the rap-punk group Bob Vylan at England's Glastonbury festival.

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.