Craig Sechler

Craig Sechler >

2
Videos
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Cyberwar Threat
Part of the Series: NOVA
PBS
The global cyberwar is heating up and the stakes are no longer limited to the virtual world of computers. Now, thanks in part to secret documents released by Edward Snowden, the true scale of the National Security Agency's scope and…
Asteroid: Doomsday or Payday?
Part of the Series: NOVA
PBS
The asteroid that exploded over Siberia--injuring more than 1,000 and damaging buildings in six cities--was a shocking reminder that Earth is a target in a cosmic shooting range. From the width of a football field to the size of a…