not forgotten B-17 Flying Fortress known as Mi Amigo
came down in Endcliffe Park, Sheffield, in 1944 killing all 10 airmen on board.
Mr Foulds was playing in Endcliffe Park aged eight when he saw the plane come down.
He said he felt responsible, because the plane was trying to avoid crashing into him.
Referring to his visits to the memorial, he said: "They are my family. I love them to pieces.
"If I go on holiday I always make sure my son goes to visit.
I always tell them how I am, what I'm doing, what the weather's like."
The US Air Force will carry out a fly-past on the anniversary on 22 February.
Crews will set off in an F-15 fighter jet from RAF Lakenheath in Suffolk, home to the largest US Air Force camp in the UK.
US and UK aircraft including Ospreys, Typhoons and a Dakota will also take part.