United's status as world champions and arguably the best supported club on the planet owes much to the pioneering work of Sir Matt Busby in the 1950's.
That's the view of former Reds midfielder Sammy McIlroy, who acknowledged this week's anniversary of Sir Matt's death in 1994 with a warm tribute on MUTV.
"I was lucky enough to play under him for a short period of time," said McIlroy, who was Busby's last signing as United boss in 1969.
"He was fantastic, the way he handled everyone at the football club. That really hit me when I came here from Belfast as a young boy. He knew everybody's name.
"He made it what it is. He's the man who made it a worldwide club."
Sammy McIlroy was speaking on MUTV's live audience programme, Wednesday Night At The Red Cafe. For your chance to be in the audience at Old Trafford and put a question in person to a United legend like Sammy, send an email to email@example.com.