to the devastating crash of the costa concordia in 2012 the killed 32 people and landed its captain inrison. then, there was the infamous poop cruise. a power outage stranded 4000 passengers without food or that happeneds before arnold donald took the helm. 99% of everyone the cruises has great time. -- the costa concordia was in action. that happens once every hundred years. arnold donald only became the ceo in 2014. he is turning a new course for the biggest name in the industry. their 62 cruise lines worldwide, serving 22 million passengers. big names like disney joined. carnival is the biggest with 10 million passengers, more than half the cruising population. the big marketeer means a bigger spotlight when things go wrong. >> one professor came out with statistics and found that between 2009 and two thirds and incidents,2013, 300 whether large or small. -- we sail full. it is just not true. -- can do anything have a have a one-off incident. >> whether it is overblown or it ishere is no denying what people are talking about it. according to the centers for disease control, ships sa

betty: to the devastating crash of the costa concordia in 2012 that killed 32 people and landed its captainprison. and then there was the infamous "poop cruise." >> human waste was actually piling up just outside their door. betty: when a power outage stranded 4000 passengers without food, water, or working toilets. >> then days and days of misery. betty: that incident happened just months before carnival's ceo arnold donald took the helm. but as he told me, don't believe all the hype. arnold: 99.9999% of everyone that cruises just has a great time. betty: right. and it doesn't make the headlines. arnold: it is a joyfull experience. yeah, the 99.99% does not make the headlines. how many times are people stuck on a runway waiting for a plane to take off? how many times do they have a traffic jam that they are stuck in on a highway or whatever? so those kinds of incidents -- the concordia, that was an accident and a tragedy, and that was more serious, but that happens once in a hundred years. betty: a relative newcomer to the captain's chair, donald only became the ceo of carnival corporation