A system includes a container to enclose vehicles within a chamber, an enclosed structure to house a canine to perform odor detection, and an air duct positioned therebetween. The container includes a first door, a second door, and a raised floor. The raised floor includes a first ramp leading to the first door, a second ramp leading to the second door, and sets of vent ducts defined between an outer wall and a top wall of the raised floor, the sets of vent ducts to direct air flow upwardly into the chamber of the container. The air duct includes a proximal end located proximate to an opening within the top wall of the container, a distal end fed through the enclosed structure to a canine-sniffing location, and one or more fan to pull air out of the chamber and deliver the air to the canine-sniffing location within the enclosed structure.