Senior Correspondent, IDG News Service
Senior correspondent at IDG News Service covering mobile tech and Silicon Valley. KJ6SDF. I run northkoreatech.org and was a 2011-12 Knight Journalism Fellow.
nasa.gov — On May 20, 2013, NASA and NOAA satellites observed the system that generated severe weather in the south central United States and spawned the Moore, Okla., tornado. On May 20, 2013, a supercell thunderstorm in central Oklahoma spawned a destructive tornado that passed just south of Oklahoma City.
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