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Chairman of the joint chiefs: Terror threats ‘serious’

Visit NBCNews.com for breaking news, world news, and news about the economy More than 20 U.S. embassies in 17 countries closed Sunday amid a serious terror th

The closed US Embassy in Cairo, Egypt, August 4, 2013. The USA issued a warning to its citizens and travelers following message intercepts by senior al-Qaida members discussing attacks against American targets. (Photo by: Khaled Elfiqi/EPA)
The closed US Embassy in Cairo, Egypt, August 4, 2013. The USA issued a warning to its citizens and travelers following message intercepts by senior al-Qaida…EPA

Tiffany Lopez