As per the FAA website this 1967-built MiG-21UT (c/n 4718) was registered N121TJ on 17th September 2008 to the South Florida Antiquities Defense Museum. It was cancelled in May 2015. Other sources list the airworthiness date as April 1998. I believe this same aircraft was based at Mojave in 2005 (all red with no markings) . It was orginally East German Air Force 291.