Alejandro Riveiro

The provided news articles focus on the Artemis II mission, humanity's return to the Moon after 50 years. The articles discuss the mission's objective to orbit the Moon and explore its hidden parts, paving the way for a future Artemis III mission that will involve a lunar landing. The articles do not mention Alejandro Riveiro. Therefore, based solely on the provided information, it is impossible to provide any details about who Alejandro Riveiro is, why they are newsworthy, or their current relevance. The articles are about space exploration and the Artemis program, and Riveiro is not mentioned in that context.