I was growing up in the U.K. at a time when people were very concerned about nuclear armaments.

Oppenheimer stuck with me as a figure and I learned more about him over the years."

“They couldn’t completely eliminate the possibility,” says Nolan.

Cillian Murphy is J. Robert Oppenheimer in OPPENHEIMER, written, produced, and directed by Christopher Nolan., Sting during an Absolute Radio session at Absolute Radio on September 15, 2016 in London, England.

Cillian Murphy in ‘Oppenheimer’; Sting.Melinda Sue Gordon/Universal Pictures; John Phillips/Getty Images

“For me, that was kind of the hook.

It’s such a dramatic moment.

I referred to it in my last film,Tenet.

What would that have been like to push that button, knowing there was any possibility of that?”

“That connection, the personal with the historic, I thought was really engaging.”

Oppenheimerdrops in theaters July 21.

See Nolan and his cast reveal more about the making ofOppenheimerin the fullAround the Tablevideo below.

EW’sAround the Tableinterview was conducted prior to the start of the SAG-AFTRA strike.

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