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 have cut costs. Are there valuable lessons to be learned here, and are UK politicians really ready to dole out some Texan justice?