"I am deeply saddened by the passing of my good friend, and space exploration companion, Neil Armstrong today. As Neil, Mike Collins and I trained together for our historic Apollo 11 Mission, we understood the many technical challenges we faced, as well as the importance and profound implications of this historic journey. We will now always be connected as the crew of the Apollo 11 mission to the moon, yet for the many millions who witnessed that remarkable achievement for humankind, we were not alone..."
Source: Dr. Buzz Aldrin, the second man to walk on the moon, in a statement issued following the death of Neil Armstrong.