Global, nonspecific threats such as those that prompted recent U.S. embassy closures and travel warnings have rarely proved credible. These precautionary measures appear to be the result of two separate threats, one attack against an unspecified U.S. embassy and another against travel infrastructure — presumably an airliner. In response to the embassy threat, the U.S. government announced Aug. 4 that it had extended the closure of several embassies in the Middle East until Aug. 10 and that African posts would now be among the embassies closed. In response to the airline threat, Washington issued a global travel alert running from Aug. 2 to Aug. 31. The travel warning and the closures have commanded the media’s attention and have led to much speculation about the source and the credibility of the threats, but more often than not these threats fail to materialize. Read the rest of this entry »