Does the US have a secret spy plane? This intriguing question has no definite answer for the general public. The War Zone recently suggested that Secretary of the Air Force Frank Kendall hinted at the existence of such a platform. The belief in a secret spy plane has continued for many years. One notable aircraft some think could exist is the so-called SR-91 Aurora, which was supposedly built in the 1980s. The government has denied its existence, and there is nothing more than circumstantial evidence to suggest it ever existed.