AP
500-mile-long lightning 'megaflash' over U.S. south certified world's longest ever
From the Watch Now: Ecuador searches for missing after mudslide, and more of today's top videos series
This “megaflash” has to be seen, to be believed.
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Emergency crews in Ecuador are searching for missing people after a mudslide left up to 22 d…
A 500-mile-long 'megaflash' over the U.S. has been certified as the world's longest, watch t…
