Terrorism: At a time when the public is losing heart on the war in Afghanistan, a decisive strike on Somalia's al-Qaida chief Monday reminds us that victory is possible and President Obama is an able leader on this front.Ten days ago, Obama signed an executive order authorizing U.S. special forces to hunt down and blow away Saleh Ali Saleh Nabhan, a ruthless Kenyan-born terrorist operating out of Somalia. In 1998, Nabhan had a role in the bombing of the U.S. Embassy in Nairobi, Kenya, which left 212 dead, including 12 Americans. The attack was so vicious, it put Osama bin...