Scientist found with suspicious item at airport did prison time for plague sample flap -- A world-renowned Texas scientist specializing in infectious diseases who was once charged with smuggling dangerous samples of plague bacteria into the U.S. was questioned by authorities after a suspicious item found in his luggage caused a massive evacuation at Miami International Airport Thursday night. Dr. Thomas C. Butler, 70, was questioned by agents with the FBI and Miami-Dade police Friday after a suspicious item was found in his checked luggage by a MIA baggage screener Thursday night, sources told NBC Miami.... Friday, it was learned...