Syria has its share of problems - problems that will likely end only through civil war or international intervention. Now they add to their woes by shooting down a Turkish warplane. In their defense, they claimed that the warplane was flying low over Syrian territorial waters, less than a mile off of their coastline. In response to this incursion they unloaded their anti-aircraft guns on it (most likely Russian-made). Turkey, of course, says that the plane was flying through an accepted corridor down to a base on Cyprus.