 One of the U.S. officials told, I'm quoting here, one of the U.S. officials told CNN they haven't seen this threat level in 10 years and said it usually means the military has received an active, reliable threat. Now, the Stars and Stripes, the U.S. military publication, was the first to report this development. And they said similar alerts have been sent to other bases in Germany, including the Army's Rhineland-Pfalz and Ramstein Air Base.