Active-duty Marines deployed to the Los Angeles area to protect federal buildings and personnel amid protests there are authorized to temporarily detain people "if threatened" or "otherwise harassed" before turning them over to civilian law enforcement, according to two defense officials. The Marines -- 700 of whom deployed from a base in Twentynine Palms , California, on Monday in response to the protests -- were still training in crowd control and rules for the use of force at a Navy base in