Mack Highway tractors and refuse vehicles from Mid-America

Mack Trucks brought a wide assortment of its products -- from highway tractors and refuse vehicles to engines and transmissions -- to the 2012 Mid America Trucking Show, including the infamous "Megatron" tractor used in the movie Transformers 3: Dark Side of the Moon. For those not familiar with this cinematic extravaganza, "Megatron" is one of the "bad guys" in the film; the leader of the nefarious "Decepticons," evil robots that are bent on destroying humanity and taking over the Earth.