The framework in which this story is centered around is quite compelling: an American embassy in a 3rd world country is being besieged by an angry and volatile anti-American mob. A security detail from a Marine Expeditionary Force (MEF) is called in to defuse the situation. From that point onward, utter chaos breaks out.
In this day & age the scene of the mob is sure to be quite gripping to any American viewer. This is especially the case given the fact that we've had several embassies overseas bombed in the past 10-20 years. Ever since 9/11 it has been exceedingly difficult to have a whole lot of sympathy for anti-American mobs, regardless of where they are.
While the film examines nicely some of the ethical intricacies of combat, the major flaw is that there is a rather large hole in the plot that even the least clever moviegoers will be able to point out. As the rest of the movie is pretty good, the best thing to do is to try and overlook this unfortunate inconsistency.
Another facet that strikes close to home is the cover-up attempts of the State Department. Not only is this plausible, but it is downright realistic. Few people with morals work for the State Department and the history of the department is filled with cloak-and-daggar silliness.
In all, this is an entertaining movie that compels one to think. It would have been a great movie, if not for the hole in the plot. It is a story that reminds us that the rules that govern war according to the Geneva Convention were written by lawyers who sat in the comfort of debate tables and not battle-hardened soldiers on the front-lines who get shot at on a daily basis.