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.

Few dramas in American political history remain more riveting than that of Nixon's exit and Mr. Ford's reaction, at first halting and then decisive, to the looming possibility of a former president on criminal trial for months on end.

Because politics rests on an irreducible measure of coercion, it can never become a perfect realm of perfect love and justice.

Growing up, politics never trickled down to the areas we come from. But people from Obama's camp, and Obama himself, reached out to me and asked for my help on the campaign. We've sat and had dinner, and we've spoken on the phone. He's a very sharp guy. Very charming. Very cool.

I'll never forget working to get my college, Wayne State University, to divest from the government in South Africa. This was the beginning of my activism, and the fight for social and economic justice has been a constant thread in my life.