But much more important than stagecraft is the force of circumstances.

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But Mr Anderson said that with regards to Iraq, he did agree with part of the diplomats' letter such as the failure to predict what happened following the overthrow of Saddam Hussein and the use of inappropriate force in certain circumstances.

BBC: NEWS | UK | Politics | Number 10 loyalist defends Blair

Campaign group Inquest said there had already been five deaths in circumstances that involved police use of force excluding firearms this year - compared with four throughout 2010.

BBC: Taser and pepper spray review ruled out by police

At least six major global coal miners have declared force majeure, which means they can miss contractual shipments because of circumstances out of their control.

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But if they have credible information of some risk to the public, officers can use powers of arrest and force - providing they use the minimum necessary in the circumstances.

BBC: Magazine

Now many of these institutions are scrambling for infusions of capital from Asia and the Middle East, as circumstances force them to put these bizarre, loss-laden vehicles back on their balance sheets.

FORBES: Magazine Article

They constructed levees that, in all but the most extreme circumstances, overcame gravity's force and held back hundreds of millions of tons of water that would otherwise seek a route to the Earth's core via New Orleans.

NPR: Defying Gravity, and Odds, in New Orleans

And for this reason, as part of my solemn obligation to the American people, I will only use force when the time and circumstances demand it.

WHITEHOUSE: President Obama at 2012 AIPAC Policy Conference