What you see are paralell runways with simultaneous landings. There is a difference... when they are staggered, or when they are actually side by side. If the runways are less than 4,300 feet apart they must be staggered or the airport must be approved for ILS PRM approaches. With this being the case, the pilots must be specially certified and learn a few extra procedures. I know MSP is one of the few airports that do the PRM approach. If they are further than 4,300 feet apart then they can be side by side without staggering. Make sense?