Investment by any foreign company in any element of the U.K.'s Critical National Infrastructure should receive careful scrutiny.

As has been the case throughout the history of terrorism, government anxiety centres on what to do about those against whom there may be intelligence but no usable evidence.

Intelligence is fragmentary and hard to discover, so it is by joining forces and sharing information with our allies that we maximise our ability to protect ourselves.

Since 1955, the U.K. has been part of an intelligence-sharing arrangement with the U.S., Canada, Australia and New Zealand. Intelligence-sharing is, in itself, commonplace.

Lady Bird Johnson did more than plant flowers in public places. She served the country superbly by planting environmental values in the minds of the nation's leaders and citizens.

So long as the global economy continues to recover, that remains Obama's No. 1 claim to successful leadership. Nothing else even comes close.

We shall never change our political leaders until we change the people who elect them.

You have to be a well-rounded leader. You can't fly by the seat of your pants anymore. You have to be incredibly tough-minded about standards of performance, but you also have to be incredibly tenderhearted with the people you're working with.