America’s space program is currently focused on the "Journey to Mars" - a hugely expensive undertaking approved by President Barack Obama in 2010. The (still hazy) plan is to fly astronauts around the red planet -- and possibly land there -- in the 2030s, bypassing the moon entirely. As a growing number of experts have cautioned, though, that could be a costly mistake. Getting back to the moon first makes more sense, both as a destination in its own right and as a way station en route to Mars.
The first thing I did when I watched the announcement on YouTube, is try to get an intuitive understanding of how big the rocket is going to be. They are actually planning to launch something the size of a skyscraper!