Through a process called metastasis a malignant tumor's cells will eventually break off, travel throughout the body, and begin forming tumors in other regions.
The site is the final resting place of an ancient Roman ship, which sank in the sixth century AD while ferrying prefabricated marble elements for the construction of an early church.
At the same time, their longer-term problems, which were affecting their market share, were eventually credited to poor training - and having looked at the details in their last report I think that's right.