That concept isn't really compelling to the masses until one focuses on the "knee" of this exponential curve -- the point where the perpetual doubling of technological growth skyrockets and negates the linear models of progress that people like economists have relied on for so long.

CNN: STORY HIGHLIGHTS

Police footage showed a man appear to drop to one knee by a car in Clifton Close, Aston, and point a gun at the helicopter, prosecutor Andrew Lockhart QC said.

BBC: Birmingham & Black Country

John's played without point guard Jamal Branch who sprained an MCL in his knee in the loss to Georgetown.

WSJ: St. John's beats Connecticut 71-65

Before this season one in which they lost All-Star point guard Rajon Rondo for the season to a torn knee ligament they had made the postseason under coach Doc Rivers six times without ever being swept out of the first round.

WSJ: Of Course the Celtics Fought Back

The point to be made on the Clinton visit is that the knee-jerk impulse for negotiations above all inevitably brings more costs than its advocates foresee.

CENTERFORSECURITYPOLICY: Clinton's unwise trip to North Korea

"There is no timetable at this point, " said Stoudemire, who's had chronic knee problems, and developed considerable soreness after a span of four games in five nights.

WSJ: Bobby V, Back at Last

Yet, even conceding that point, it remains unhelpful that France so often resorts to a knee-jerk anti-American stance in its foreign policy.

ECONOMIST: How France could improve its foreign policy

Smith added 18 and the Knicks overcame a 22-point deficit and the loss of Anthony, their All-Star forward who went out with a knee injury in the first half, to beat the Cavaliers 102-97 on Monday night and end a 10-game losing streak in Cleveland.

WSJ: Knicks rally without Melo, beat Cavaliers 102-97

And with strikers Wayne Rooney (hamstring) and Dimitar Berbatov (knee) now also doubts for the match against Aston Villa, Ferguson's squad is stretched to near breaking point.

BBC: Manchester United call up teenage defender Oliver Gill