'Preppers' vs. Professors: Sides disagree on catastrophe at Mayan calendar's end
Credit: WFAA
Thousands of people are preparing for the end of the world, based on an ancient calendar. Nico Sanchez is ready, with his gas mask and machete. He is among many people who call themselves "preppers" who believe that when the clock ticks down to Dec. 21, there will be a catastrophic event that could possibly lead to the end of the world.
