NBC's Today show has cancelled its trip to Cuba -- after it was unable to get Fidel Castro for an interview.

Castro decided to talk only to ABC's Barbara Walters. That chat airs on tomorrow's 20/20. 

"We never claimed for our interview to be exclusive -- we just wanted an interview [with Castro] if we were going to do a show from there," said Today show spokeswoman Allison Gollust. 

"We counted on that interview as a component of our show. When [Castro] pulled out, that changed things." 

Today show co-host Matt Lauer was scheduled to go live from Havana tomorrow to commemorate the 40th anniversary of the Cuban Missile Crisis. 

Part of that telecast was to have included an interview with Castro conducted by NBC's Andrea Mitchell. 

"The bottom line is that more than two weeks ago we made our plans to go to Cuba, and a significant part of that decision was based on an agreement with the Cuban government that we would have an interview with Castro," Gollust said. 

"When they ultimately reneged on that agreement, we felt it wasn't a smart idea to spend a significant amount of money to bring Matt down there. 

"We'll cover [the Missile Crisis anniversary] from here in New York."

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