The Vatican does not have clear guidelines for applying the principle of reciprocity, said Cardinal Jean-Louis Tauran.
President Obama said he would be happy to avoid ethical disputes if alternatives to embryonic stem-cell research turn out to be equally promising.
The Notre Dame president called President Obama's upcoming visit "a basis for further positive engagement.
Mary Ann Glendon (left), former U.S. ambassador to the Vatican, will receive the University of Notre Dame's Laetare Medal on May 17.
Palm Sunday (B), April 5, 2009 Easter Sunday (B), April 12, 2009
The events of the Seder and the form and meaning of Passover can be a very real part of the events of Holy Week and of the central story of the Christian tradition.
Twenty-five years after his death, Rahner's works still illuminate.