When his friend, recording artist Johnny Mann, released "At the bottom of the fair", he wrote on the back side of the album, "The first time I was in an underground home was in the Colorado Rockies under a mountaintop 9500 feet above sea level! And it was here that I met the owner, Mr. Jerry Henderson. As his guest, I soon became aware of the fantastic possibilities of underground living, and at the same time struck up a lasting personal friendship with Jerry." In the early 1980s, Summa Corporation, owned by the late Howard Hughes, supervised its holdings from leased office space in the Alexander Dawson building from Henderson's Alexander Dawson corporation in Las Vegas. It was perfect for security reasons, since it had two underground floors. In 1960, Henderson created the Alexander Dawson Foundation. The Foundation is a nonprofit organization that is dedicated to education. In 1980, Henderson created the Colorado Junior Republic School (CJR) on a 380 acre site near Lafayette, Colorado, as a boarding schoold for bright but troubled children who otherwise wouldn't have an opportunity for an education. The school's supporters say the "micro-economy" they have designed demonstrats to students the way American free enterprise works and teaches them how to succeed in the economy of the real world. Today, the school is called the Alexander Dawson School (ADS) and is operated under the Alexander Dawson Foundation. The school is a coeducational college preparatory day school for grades K-12. Around 1977, Jerry flew an executive Convair 580 turbo prop airplane, originally built for Bethlehem Steel Corporation for corporate use. Jerry and Mary had a picture taken on the tail of their Convair 580 turbo prop airplane for a Christmas card. The stencil on the tail, which stands for "Marine Corps Air Station Beaufort". The number and letters on the tail were for Mary's name and birthday, January 23rd. Henderson had a passion for flying ever since he saw Charles Lindbergh honored for his solo flight across the Atlantic with a ticker tape parade down Broadway in NYC in 1927. This experience moved Jerry to buy an open cockpit plane and learn how to fly. He was one of the nation's earliest pilots. His pilot's license number was in the upper four digits and was signed by the surviving Wright Brothers. On September 1, 1978, Henderson invested in and was on the board of directors for Gulfstream American Corporation, a company formed by Allen Paulson, which acquired the Grumman American Aviation Corporation for $32 million and $20.5 million in preferred stock.