Tensions are escalating in the standoff over Iran’s capture of 15 British sailors. On Sunday, hundreds of people demonstrated outside the British Embassy in Tehran, setting off firecrackers that sent up large clouds of smoke. Meanwhile, Iran aired new video of a captured sailor confessing to entering Iranian waters.

Nathan Thomas Summers: “I’d just like to apologize for entering your waters without any permission, and I know it happened back in 2004, and our government promised it would not happen again, and again I would like to apologize for entering your waters.”

The British government has rejected the tape and said the comments were coerced.