The taxi stand was only an open shelter, so I was freezing as I looked toward midtown. I could see the RCA building with its bright red logo at Rockefeller Center, and farther south, the Empire State Building with its illuminated set-backs. At the tip of Manhattan, the twin towers of the World Trade Center -- which were over 1,100 feet tall themselves -- flanked the mile-high Space Trylon. It was clear as well as cold, and as I looked toward Frank Lloyd Wright's masterpiece, it seemed to be poijnting to the stars. This, of course, was the idea, since it embodied the joint American-Soviet space exploration program that settled the Moon in 1955, and, twenty years later, Mars.