Final approach

Here is a great image (pop-up) of a Lufthansa 747-400 and a United 757-200 that were on simultaneous approaches to runways 28L and 28R at San Francisco (SFO). The separation requirement for flying parallel and simultaneous approaches is 225 meters (about 750 feet). These two aircraft are at a safe distance for the approaches they are each flying.

{click on it !}

This incredible illusion is due to the 747 being three times larger than the 757, being slightly behind the 757, and the depth of field limits of a telephoto lens.