The US Federal Aviation Administration (FAA) issued a series of flight advisories on Friday, warning airlines to exercise caution in the airspace over Mexico, Central America and parts of South America due to potential "military activities." "The FAA issued flight advisory notices to Airmen for specified areas of Mexico, Central America, Panama, Bogota, Guayaquil and Mazatlan Oceanic Flight Regions, and in airspace within the eastern Pacific Ocean," an FAA spokesperson said, adding that the