The explosion occurred as about 400 U.S. military personnel are moving Patriot missile defense equipment to a Turkish base as part of an effort to defend the country from possible attack from Syria.

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It was built on a military base, says Iran, the better to defend it from air strikes.

ECONOMIST: Diplomacy and Iran

However, while sales in the developed markets of the U.S., Canada and U.K. continue to decline steeply, a sustained popularity of the BBM service in international markets has helped RIM defend its subscriber base quite well.

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