It's not entirely clear whether the explosives were meant to go off over cities, causing even more casualties, or over sea.

NPR: Inside the British Probe of the Terrorist Plot

And when we go back to the sea -- whether it is to sail or to watch it -- we are going back from whence we came.

WHITEHOUSE: Presidential Proclamation -- National Oceans Month, 2012

Then the second phase: Discovery, where we push a little more and venture out more into the world: exercises classes prepare the body and the mind for such activities as river or sea kayaking, boogie or surf, zip-lining, stand-up paddle, to go beyond our fears.

FORBES: Let The Sun Do Its Magic: A Wellness Beach Adventure In Costa Rica