In briefs filed yesterday with the Supreme Court, 48 nations, 18 Nobel Peace Prize winners, 28 U.S. religious groups and a host of medical, legal and child advocacy groups called on the Supreme Court to declare that it is unconstitutional to execute people for crimes committed as a minor. The United States is one of just five countries in the world that execute juvenile offenders. The briefs were filed in the case of Christopher Simmons. He is facing the death penalty for a murder he committed at the age of 17. The Supreme Court will hear the case in the fall.