George Tiller’s clinic in Wichita, Kan., is one of only three in the nation that performs late-term abortions, according to an AP tally. He had already been shot – once in each arm – in 1993, and his clinic was bombed in 1985. He often traveled with a bodyguard, according to several reports. Both abortion rights and anti-abortion activists condemned the killing. But it comes as the debate over abortion has been reemerging on a national level. It was at the center of the backlash to President Obama’s address at Notre Dame University on May 17. It has also come up as a potential cause of questioning later this summer during hearings to confirm Sonia Sotomayor, Mr. Obama’s Supreme Court nominee.