(CNN) -- John Lennon would have turned 70 years old this month, and were the late Beatle alive today, he might be sitting in a rocking chair in Cornwall, England, with wife Yoko Ono waiting for a postcard from their son, Sean, Ono said in an exclusive interview with CNN's Anderson Cooper. But eventually his spirit for activism would have roused him out of his retirement rocker, Ono added. "I'm sure that, if he got to be 70, then he would have forgotten all of that: No, we have to do something now. And I'm sure this is when he would have been totally activist," Ono said. The wide-ranging three-part interview continues with the second installment on Cooper's "AC360" Wednesday night.
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CNN's Anderson Cooper interviews Yoko Ono in a three-part exclusive airing this week
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"We should celebrate that he was here," Ono says of Lennon
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She doesn't trust Lennon murderer Mark David Chapman
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Blaming her for the Beatles' breakup is due to racism and sexism, Ono says
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