I heard Walter Schirra, the only man to have flown on all 3 of NASA's early space missions died. Is it true?

Answer 1

It is true.
He died yesterday (May 2nd) from a heart attack at Scripps Green Hospital, in La Jolla, California, age 84. He had been suffering from cancer.

Answer 2

Yes it is ..
here are some info I found on our observatory database newsfeed .

Walter M. Schirra Jr., one of the original Mercury Seven astronauts and the only man to fly on NASA's Mercury, Gemini and Apollo programs, died Thursday. He was 84.

Schirra died of a heart attack at Scripps Green Hospital in La Jolla, said Ruth Chandler Varonfakis, a family friend and spokeswoman for the San Diego Aerospace Museum. NASA had said he died late Wednesday but the family and the medical examiner's office both said it was Thursday.

What meant the most to him in life was seeing Earth from space.
"I was very impressed with the fact that as I passed over India and China – this was 1962 – clouds of dust and smoke covered both countries very, very extensively, where Africa was fairly clear, which proved to me something was going wrong with the environment even then. "

Answer 3

Follow the link

Answer 4

Sadly, yes. He was 84. But you have your history scrambled. Here's the missions he flew:

Mecury (Sigma 7) the 5th American in space (3rd orbital filight)
Gemini 6 (first rendezvous in space with Gemini 7)
Apollo 7 (first Apollo mission--Earth orbit only)

Answer 5

Yes, he died recently.

Answer 6

True.

Answer 7

true