District of Columbia
                            Since 2003
                         
                                            
                            Nebraska
                                                    
                                            
                                            
                            Nebraska 1987
                                                    
                                            
                            U.S. Court of Appeals, District of Columbia Circuit 2003
                                                    
                                            
                            U.S. Court of Appeals, Eighth Circuit 2002
                                                    
                                            
                            U.S. Court of Appeals, Eleventh Circuit 2001
                                                    
                                            
                            U.S. District Court, District of Columbia 2003
                                                    
                                            
                            U.S. District Court, District of Nebraska 1987
                                                    
                                            
                            U.S. Supreme Court 1999