sweat talked about the months of planning over their escape. sweat was caught three weeks on the run. let's get more from cnn's miguel marquez. >> reporter: christine, really interesting details in the new york times account of how sweat and matt escaped from the maximum security prison in upstate new york. sweat was free for months under the tunnels under the clinton correctional facility. at 11:30 p.m. after the last head count, he with go down into the tunnels and come back up at 5:30 a.m. before the first head count. he would chip away at the concrete walls using a sledgehammer and hand tools. he caught a lucky break. they turned off the steam to the steam pipe providing heat to the prison on may 4th. he was able to short circuit by cutting through the steam pipe with a hacksaw. it took him over a month to do