http://www.nsa.gov/about/cryptologic_heritage/vigilance_park/index.shtml
Dedicated on 2 September 1997, National Vigilance Park and its Aerial Reconnaissance Memorial stands to honor those "silent warriors" who risked, and often lost, their lives performing airborne signals intelligence missions during the Cold War.
The centerpiece of the memorial is a C-130 aircraft, refurbished to resemble the reconnaissance-configured C-130A which was downed by Soviet fighters over Soviet Armenia on 2 September 1958.
In addition to the C-130, the NVP also has on exhibit an Army RU-8D Seminole. This aircraft pays tribute to the service and sacrifice of soldiers assigned to perform aerial reconnaissance and cryptologic intelligence-gathering missions during the Vietnam Conflict.
Finally, the U.S. Navy's contribution to National Vigilance Park bears the markings of an EA-3B aircraft, Ranger 12, assigned to Fleet Air Reconnaissance Squadron Two (VQ-2). The original aircraft was lost during an operational mission in the Mediterranean on 25 January 1987 while attempting a landing on the USS Nimitz. All seven crewmembers aboard Ranger 12 perished.