One of the world's biggest and strongest trucks is a 300-ton machine. The Caterpillar 797B Dump Truck hauls 380 tons of rock. Its expert engineering makes dangerous mining work in the remote Canadian wilderness possible.

Deep in the Arctic, a team of engineers must move an entire town, and expert engineering makes this dangerous and high-stakes transport possible. The land under Malmberget, Sweden is sinking since one of the biggest iron ore mines on earth is 4000 feet below it. With its historic importance to Sweden, the state-run mining company LKAB is moving the 3200 residents, the homes, and buildings to Koskullskulle 4 miles away.