Å·ÃÀ¿Ú±¬ÊÓƵ

Russia launched a missile and blew up one of its old satellites last week, triggering an alert for the International Space Station and concern that space could become a new battleground. Å·ÃÀ¿Ú±¬ÊÓƵ Public Radio spoke with Iain Boyd, a professor of aerospace engineering sciencesÌýand director of the Center for National Security Initiatives.