Past Historic Events Collage for App

I need a image collage. This image is for the splash screen for an iPhone & iPad app. So I need the following dimensions for the same image. 768x1024 1024x768 640x960 960x640 The image needs to be a nice collage of events in History...here are some suggestions...all these images will have to be found on the internet, I will NOT provide. September 11th, 2001 Peral Harbor Battle of Iwo Jima - Soldiers Holding up Flag Image Apollo 11 Landing on the Moon Civil War Great Depression Challenger Explosion Hurricane Katrina Rosa Parks Berlin Wall Torn Down Atomic Bomb Dropped First Satellite Launched Adolf Hitler Titanic JFK Assassinated Wright Brothers First Flight These images to be collaged together and look outstanding. This is a MAJOR part of our app and most look very neat and nice as a collage. The images must actually be images, not drawings.