One diplomatic source in Washington said, “The ‘Rocket Man’ CD was the subject of discussion during Trump’s lunch with Kim. Kim mentioned that Trump referred to him as ‘rocket man’ when tensions ran high last year” after a series of nuclear tests and missile launches by the North. “Trump then asked Kim if he knew the song and Kim said no.”

Trump remembered the conversation and told Pompeo to take a CD with the song for Kim. He reportedly wrote a message on it and signed it.