WASHINGTON — The 11th Circuit Court of Appeals on Thursday denied Sen. Edward Kennedy's petition to file an amicus brief in three cases in order to challenge the constitutionality of Judge William Pryor's recess appointment. Kennedy, however, has vowed to keep challenging Pryor's appointment. "It's disappointing that the United States Court of Appeals for the 11th Circuit declined to consider, at least for now, the constitutionality of President Bush's recess appointment of William Pryor to that court in February," Kennedy said in a statement.