President Barack Obama voiced shock and outrage this evening over the slaying of a Wichita, Kan., abortion-provider, Dr. George Tiller. Tiller, who remained one of the nation's few providers of late-term abortions despite decades of protests and attacks, had been several years shot before. This time, the shooting as he served as an usher at his church today was fatal. "I am shocked and outraged by the murder of Dr. George Tiller as he attended church services this morning,'' Obama said in a statement issued by the White House this evening.