Word: strikes
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...neither of those where American boots are on the ground. Beset by feckless leadership, preoccupied with its rivalry with India and infested with militant groups, Pakistan in 2009 became a viper pit of terrorist plots and political malaise. The death of Taliban leader Baitullah Mehsud in an August drone strike ratcheted up the stakes. After months of planning, Pakistan's Operation Path to Deliverance sent 28,000 troops to root out insurgents in South Waziristan in October. As threatened, extremists responded by unleashing attacks throughout the country...
With the FBI releasing only sketchy details about the failed attempt to bring down the Northwest Flight 253 in Detroit, many counterterrorism officials and experts caution against hasty conclusions. "This was clearly an attempted terror strike, but it's too early to say whether this guy was a lone, self-motivated terrorist or a part of a larger plot," says one counterterrorism official. "We obviously have to assume the worst and investigate this thing down to the smallest details...
...Yemen connection: For several years, counterterrorism officials have said that al-Qaeda has been looking to consolidate and expand its base in the country of Osama bin Laden's ancestors. Yemeni authorities, prodded by Washington, have recently mounted an operation to wipe out the terrorist havens - including a missile strike this week that, officials in the Yemeni capital Sanaa say, killed 30 top al-Qaeda operatives. But if Abdulmutallab's plot did indeed originate in Yemen, then it would suggest that much more remains to be done. (See how al-Qaeda is creating a crisis in Yemen...
Perhaps because it seems intuitively true, the notion persists that running, especially when done long-term and over long distances, is bad for the joints. Indeed, it would be hard to think otherwise when with each foot strike, a runner's knee withstands a force equal to eight times his or her body weight - for a 150-lb. person, that's about 1,200 lb. of impact, step after step...
...reason is less air time, researchers say - the less time a runner's feet spend airborne, the less force they strike the ground with. Still, the results of a mathematical model are difficult to re-create in real life, especially since it takes a fair amount of practice to adjust to a shortened stride. Runners who abbreviate their stride try instinctively to quicken their pace to compensate. That can negate any protective effect of stride shortening - when you speed up, the force on the bone increases proportionately...