American pilot Ethan Guo has been released after being detained at a Chilean military base on King George Island in Antarctica. Guo, who had embarked on a solo journey to all seven continents, was detained in June after landing without permission. He had been effectively stranded at the base since June 28. Authorities cited his unauthorized landing as the reason for his detention. Guo’s release marks the conclusion of his ordeal, which has drawn international attention due to the remote and politically sensitive nature of the Antarctic region.