Donald Trump this morning blamed television for not yet producing proof of his claim that he saw a TV broadcast in which thousands of Muslims in New Jersey celebrated when the World Trade Center was downed by terrorists.

“Don’t forget … 15 years ago, it wasn’t like it is today, where you press a button and you play a video,” Trump told MSNBC’s Morning Joe this morning when asked again if he’s standing by the claim he made about a week ago. “Fourteen, 15 years ago, they don’t even put it in files, they destroy half of the stuff. You know, if you look back 14, 15 years, that was like ancient times in terms of cinema and in terms of news and everything else. They don’t have the same stuff. Today you can press a button and you can see exactly what went on, you know, two years ago. But when you go back 14, 15 years, that’s like ancient technology, Joe,” he told Joe Scarborough.

“They’ll find something. They’re going to find something,” Trump insisted by phone during the morning telecast.

One day earlier, on NBC’s Meet The Press, Trump insisted his claim must be true because not only did he see the video on TV, “so did many other people — and many people saw it in person. I’ve had hundreds of phone calls to the Trump Organization saying, ‘We saw it. There was dancing in the streets.'”

“They want to agree with you – that doesn’t make it true,” host Chuck Todd at one point interjected.

“Why wouldn’t it have taken place?” Trump replied when Todd asked if he was standing by his claim. “I’ve had hundreds of people call in and tweet in on Twitter saying that they saw it and I was 100% right. I saw it and so many people saw it, Chuck. So why would I take it back? I’m not going to take it back.”

In the exchange, Trump told Todd: “I have a very good memory, Chuck. I’ll tell you, I have a very good memory. I saw it somewhere on television many years ago, and I never forgot it — and it was on television, too.”

It all started about a week ago, at a rally in Birmingham, AL, when Trump told followers: “I watched when the World Trade Center came tumbling down. And I watched in Jersey City, New Jersey, where thousands and thousands of people were cheering as that building was coming down. Thousands of people were cheering. So something’s going on.”

A few days later, Trump counsel Michael Cohen told CNN it is irrelevant how many Muslims in New Jersey celebrated the collapse of the World Trade Center, whether “it’s thousands and thousands or a thousand people or even just one person.”