An announcement came out on June 12, 2019 that an agreement had been made between the governments of the United States and Ecuador that would allow the US military to extend the runway of the airport on San Cristóbal Island, then use it as a base for AWACS surveillance planes, specifically the Lockheed AP-C3 Orion and the Boeing E-3 Sentry (derived from the 707).
San Cristóbal Island is the easternmost of the Galapagos Islands, and is the second-most populous, with 5,600 people. Like all of the Galapagos Islands, it has a huge population of sea lions, birds, marine iguanas, and tortoises. The airport is one of three in the Galapagos Islands; the other two are Baltra and Puerto Villamil. There are commercial flights to the San Cristóbal airport from Quito, Guayaquil, and Baltra. The runway is 1,900 meters (6,230 feet) long.
The entire Galapagos Islands are an Ecuadorean national park and marine reserve, and a UNESCO World Heritage Site. UNESCO has previously expressed concerns about the impact of human activity on San Cristóbal, at the airport in particular. Any expansion of this airport will reduce wildlife habitat, and any increase in air traffic will damage the bird population. Long story short, this is one of the most ecologically sensitive areas on this planet.
The stated purpose of the AWACS planes is "the fight against narco traffic".