War in Yemen?

It seems that Al Qaeda’s base of operations is now Yemen, not Afghanistan. That country on the

Arabian peninsula is where the Nigerian bomber got his training and where new threats are coming from. President Obama has said that our quarrel is not with Islamic radicals in general, just Al Qaeda. So should we now invade Yemen?

Just before Christmas, American forces participated with those of the Yemeni government in an air strike said to have killed 30 al Qaeda operatives. (One of them was thought to be the guru of the Ft. Hood shooter, but he apparently is still alive and may have played a role in the Underwear Bombing.) So President Obama, who must have approved the strike, may be thinking in these terms.

How about if we forget about nation building and long-term occupations? Instead, we just attack the terrorists where we find them, and then leave? And if they re-assemble, attack them again. And then leave.