KANSAS CITY, Mo. — Edwin Shifrin’s family knew he successfully escaped from a Nazi prison camp during World War II, but it wasn’t until one of his children started digging into his wartime past that they learned the details of the clever escape. Shifrin, 93, seldom discussed his time at war, but he received a prisoner-of-war medal in February after son Dan Shifrin dug through old news reports and his father’s military records and pieced together what happened. “It is an amazing story,” said Missouri Sen.