The M60 armored army tank can make a bridge in under two minutes! The bridge is 19 Meters(60 foot) retractable bridge. Once the tank fully extends out the bridge on the ground or over water the M60 tank disconnects itself and drives over it safely. When the tank gets to the other side it reconnects with the bridge and retracts it back on top of the tank.

The engineer-er had to think of way to easily have an M60 tank travel with the bridge on top and then be able to slowly yet time efficiently get it on the ground flatly.