At the time, 126 crew members were on board: seven BP employees, 79 of Transocean and employees of various other companies.
The Justice Department also filed criminal charges against three BP employees.
At the same time, he launched a $2.8bn suit against two BP employees nominated to the board of TNK-BP Holdings.
In an earlier appearance before BP employees in Britain, Dudley praised his predecessor for having the decency to stand down "just when things are starting to go right".
The American advertisements feature BP employees, mostly involved in the clean-up process, explaining what the company is doing to cleanse the areas affected.
BP officials said that all 15 workers killed were believed to have been contractors, not BP employees.
Nearly 700 BP employees involved in the KG Ethylene Project turned up to enjoy a delicious grill and tasty menu specially prepared for the event.
MyHR will allow BP employees in about 100 countries to track their benefits, follow company job listings and update their records.
The rowing club was originally established in 1961 for BP employees, hence the club colours of green, yellow and black.
Our aim is to ensure that all BP employees have equal opportunities for career advancement.