Re: one year to change the world
Well first I'd disguise myself so no one would recognize me after my year was up.
Then I'd take out North Korea's nukes, then all their military equipment, then all government run research labs, and then I'd gift wrap Kim Jong Ill and leave him on the lawn of the CIA. Then I'd let South Korea know that get to expand.
Same basic treatment for Syria and Iran. I would build the damn wall between Mexico and the US (out of metal I'd get from the Dangerously Close Asteroids) I'd make it 80' tall and 15' wide with four big giant gates.
Before my powers faded I'd help NASA by dropping off probes on each planet and moon as well as bringing them whatever samples they want. Any asteroids that are dangerous would be crushed into dust by me. Then I'd get myself a couple hundred million dollars to live off of when my powers are gone.