question: Which event happened first, he boarded American Airlines Flight 63 or Reid pleaded guilty in U.S. federal court?
#1 return Reid boarded American Airlines Flight 63 
#2 return Reid pleaded guilty in  U.S. federal court 
#3 return when  was  #1 
#4 return when  was  #2 
#5 return which is the  lowest of #3 ,  #4