As the UK's imprisonment rate remains the highest in western Europe, Panorama joins Michael Gove - the man in charge of British prisons - on a fact-finding mission in Texas. 'Hang 'em high' Texas is not the first place you might look for lessons in criminal justice - they execute more people and lock up more offenders than anywhere else in America. But now this conservative state is the unlikely centre of a rehabilitation-led revolution in prison reform that's sweeping through the US. Crime is down, prisoner numbers have fallen and on top of this - they've cut costs. Are there valuable lessons to be learned here, and are UK politicians really ready to dole out some Texan justice?