Vitaly Raskalov and Alexander Remnov are just two typical Russian dudes. They wake up in the morning and go for walks with their camreas. Sometimes their 'walks' end up on the top of a building. Sometimes it is the top of a crane or maybe its the Russian Academy of Sciences. They take amazing, vertigo-inducing shots of the top of the world.
Skywalkers sure does sound like an appropriate name for this lot.