Buzz Aldrin on death of John Glenn: 'I'm saddened again to hear that we have lost the pioneer of space flight for the United States, second only to Yuri Gagarin, and he will always go down in history as certainly one of the most influential officers in the Marine Corps and of course as one of the original Mercury 7 astronauts. I am very sorry that he has departed us with his wisdom. I join that crowd of people and the entire nation and the world in paying homage to his service'