Expedition 28 was a mission to the International Space Station (ISS) that took place from June to November 2011. It involved a crew of six astronauts and cosmonauts who conducted scientific research and technology demonstrations in microgravity. The mission was part of a series of expeditions aimed at maintaining and operating the ISS. During Expedition 28, the crew performed various experiments in fields such as biology, physics, and Earth sciences. They also participated in educational outreach activities, engaging with students on Earth to promote interest in space exploration and science. The mission contributed to the ongoing research efforts aboard the ISS.