https://www.reuters.com/article/us-marriott-intnl-cyber/marriotts-starwood-database-hacked-500-million-may-be-affected-idUSKCN1NZ1D0

Marriott International said on Friday hackers stole about 500 million records from its Starwood Hotels reservation system in an attack that began four years ago, exposing personal data of customers including some payment card numbers.