The Associated Press reports that Bethesda teenager Collin McKenzie-Gude has pleaded guilty to a misdemeanor count of attempted carjacking. McKenzie-Gude was arrested last year and charged with a number of offenses, including making and exploding pipe bombs and illegally possessing firearms. Some of those charges were later dropped, but McKenzie-Gude is still facing trial for possessing an unregistered explosive device and production of false identification documents. Among the items seized from McKenzie-Gude’s home before his initial arrest was a map of Camp David marked with a presidential motorcade route, several assault rifles, two shotguns, one handgun, ammunition, plus chemicals and several gallons of liquid material and components that can be used to make homemade explosives. Yesterday’s guilty plea was related to Gude’s attempt to carjack a 78-year-old man in the parking lot of the White Flint Mall on Tuesday, July 29, the day that authorities searched his home.