Within about a one square mile area around that wellhead and the riser pipe and everything else, at any particular time you could have between 14 and 20 ROVs operating down there.

WHITEHOUSE: Daily Press Briefing

The younger Mr. Tsarnaev allegedly told interrogators that he and his brother wanted to detonate up to six more devices in Times Square, Mr. Kelly said, including five pipe bombs and one pressure-cooker bomb similar to the two used in the attack on the marathon.

WSJ: Times Square Was a Target, Officials Say

New York police said on Thursday the Tsarnaev brothers had concocted a spur-of-the-moment plan to drive the hijacked car to Times Square and detonate their remaining explosives: a pressure cooker device and five pipe bombs.

BBC: Boston Marathon bombing suspect moved to prison