An X-ray machine at London International Airport detected a .357 calibre revolver in carry-on luggage as the 72-year-old man was going through pre-board screening on Monday morning.
Police say the loaded revolver was seized, the man was arrested, charged with careless storage of a firearm, and held in custody for a court appearance on Tuesday morning.
Investigators say the Crown reviewed the case and after "considering all the facts," decided to withdraw the charge against Joseph Frost.
Frost has since departed for Texas.
(CKOT, The Canadian Press)