<human>:  Is Alan Alda old enough to have fought in the Vietnam War?
<bot>: Yes, Alan Alda is old enough to have fought in the Vietnam War. Alan Alda was born in 1936. The Vietnam War was from 1955 to 1975, with American involvement from 1965 to 1973. American soldiers must be at least 18 years old. Alan Alda was 29 in 1965. So, Alan Alda was old enough to have fought in the Vietnam War. He was born in 1936.