News at Eleven: Sarcastically called the "Hanoi Hilton"

by American POWs, it was a place of torture, deprivation and often solitary confinement.

Borling spent much of his time there just trying to survive. He also composed poetry--in his head, without benefit of pencil or paper.

He is now out with a book of poems he wrote and memorized during those years, Taps on the Walls: Poems from the Hanoi Hilton.

from NPR: Books: In A North Vietnamese Prison, Sharing Poems With 'Taps On The Walls'
then NPR: Books: Taps on the Walls: Poems from the Hanoi Hilton

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