What will it take to rebuild Notre Dame? What caused the devastating fire in the first place? Randall Ott, the Dean of Architecture at Catholic University of America, has lectured on the famed cathedral as an architectural masterpiece. But he also explains how the 850 year old Gothic style cathedral, was so vulnerable, particularly during attempts to renovate and rehabilitate. Ironically the two greatest dangers... the fire of course... but then the water used to douse the fire. Ott explains what the next steps will be in restoring the jewel of Paris.. and the soul of France... and whether it can even be done in the five years President Macron has vowed.