HOUSTON, April 30, 2010 (LifeSiteNews.com) - Houston Pro-life groups are planning a huge prayer vigil today (Friday, April 30) in protest of Planned Parenthood's Gala celebration of the completion of the largest abortion facility in the western hemisphere. The 78,000-square foot facility, which has been constructed to perform late-term abortions, is scheduled to open on May 11. In a press release the Houston Coalition for Life notes that the new facility will make Houston "the abortion capital of the southern part of the United States and South America. Viable unborn children will die in this facility with Planned Parenthood...