The NYPD has been a national leader in recognizing that policing in an age of terror requires not only proactive intelligence collection but the ability to act decisively upon the fruits of that collection rather than waiting for disaster to strike, and then reacting.

CENTERFORSECURITYPOLICY: Policing Terror

Despite preparatory work on the site being complete, EDF is waiting to agree the strike price with the government - for the nuclear power generated - before construction can begin.

BBC: Hinkley Point C proposal

And a number of colleges and other institutions were waiting for strike ballots to come back.

BBC: Lecturers warn of national strike

They tend to lurk behind corners, waiting in the fine print, for the right time to strike, taking consumers by surprise.

FORBES: 5 Most Annoying Banking Fees