http://blog.newsweek.com/blogs/stumper/archive/2008/04/17/the-filter-april-17-2008.aspxA round-up of this morning's must-read stories. OBAMA PRESSED IN PA. DEBATE (Anne E. Kornblut and Dan Balz, Washington Post) In their first head-to-head encounter in nearly two months, Obama (Ill.) and his opponent for the Democratic nomination, Sen.enCommunityServer 2.1 SP2 (Debug Build: 2.18)