Very good movie, 8/10. The suspense the last 30 minutes were intense. I've never seen Kirk Douglas this good, the closing scene were as poignant as anything I've seen in a while, and Walter Matthau does a wonderful "Walter Matthau" as always.
Recommended.

Wow. Inspiration for Rambo, anyone?

"Jackie read off the list of what was available, and the President selected the one [film] we had all unanimously voted against, a brutal, sadistic little Western called Lonely Are the Brave."
Bradlee, Benjamin C., "Conversations with Kennedy".