Russian officials notified U.S. planners at a coalition headquarters in Qatar before the strike, Pentagon spokesman Peter Cook said. It was the first time the Russians and Americans have put into action an October agreement to coordinate their countries' respective operations in Syria.
Do you think it's grammatically correct to say a headquarters? The word has a define plural sense to it. Generally, it feels absolutely weird to use an indefinite article in front of a word that ends in s. And it should be because the s marker makes an idea or thing plural, whereas an indefinite article denotes the fact that we only have one of something. Is this an exception to the rule? How do you native speakers actually reconcile this problem? Is this something that you find strange too?