MOORE, Okla. -- It's been one year since a massive tornado ravaged the town of Moore, Oklahoma. The twister flattened 1,100 homes in its 17-mile path, killing two dozen people. The residents of Moore ...

Tornadoes are among the most dangerous natural calamities on Earth. These natural disasters hold the power of erasing cities, towns and villages off the map within a matter of a few minutes. And the ...