A missionary arrested for trying to pass through airport security with a razor blade and a hacksaw blade in his shoe said he carried the blades while living in Brazil because he had received several threats on his life. David McIntyre, who was arrested Monday at the Miami International Airport and charged with carrying a concealed weapon, said he forgot the blades were there. McIntyre, 38, of West Chester, Pa., had been living in Belo Horizonte, Brazil, working with the Harrisburg, Pa.-based Association of Baptists for World Evangelism. He was heading to Philadelphia with his wife and three children for...