three months on the gulf of mexico floor. according to a federal judge three billion barrels of oil spewed into the water damaging coastlines from florida to texas. that same judge ruled bp's gross negligence and willful misconduct were to blame for the disaster. five years later bp tells us many lessons were learned. new technology has been implemented across the industry like enhanced blowout preventers. this giant piece of gear you're looking at now, developed by bp, and it is designed to prevent another spill we're told of this magnitude. >> capping stack is an enormous piece of equipment up to five stories tall, weighing tons and tons. and can then be deployed, as far under water as is necessary on top of the wellhead to shut off the flow of oil, coming out of the, out of the well. >> reporter: but some