David Wright

Twenty-five years after the end of the Cold War, the United States and Russia continue to keep nearly 2,000 nuclear weapons constantly on high alert, ready to be launched in minutes. This is commonly...

The next in our Global Security Technical Webinar Series will be held on Thursday, February 11, at noon Boston time (17:00 UTC) (for corresponding times around the world click here ). Dr. Jonathan...

North Korea launched earlier than expected, and successfully placed its second satellite into orbit . The launch took place at 7:29 pm EST Saturday, Feb. 6, U.S. time, which was 8:59 am local time on...

North Korea has announced that it will launch a rocket sometime in the next two weeks to put a satellite in orbit for the second time. What do we know about it, and how worried should we be? Fig.1...

A fireball seen in the sky over the western U.S. got a lot of press attention today , with people wondering what it was and whether it was a threat. The U.S. military, which tracks objects in space,...

On December 1, the U.S. military started its annual tracking of Santa’s flight from the North Pole. Really. NORAD—the North Atlantic Aerospace Defense Command —is not known for its sense of humor...

On this day in 1979, operators at the U.S. missile warning center were shocked to see their displays light up with the ultimate horror : a full-scale Soviet nuclear attack bearing down on the United...

The Cuban Missile Crisis played out in the second half of October 1962. People generally know that it brought the world close to nuclear war but that in the end U.S. and Soviet leaders kept their...

It seems that just about every week the claims about how many MIRVed warheads Chinese missiles can carry grow by leaps and bounds. The latest reports have gone from ridiculous to embarrassing. Long...

The moon made headlines last week with the appearance of a so-called “ super blood moon .” Several people I talked to, though, thought that name was a bit dramatic for what they actually saw in the...

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