Despite the earlier news that the takedown was by two Marines it was by two members of other services and a civilian friend. The following article from the London Daily Mail was very detailed and had many pictures.
Despite the headlines, these were not two marines, but Air Force airman Spencer Stone and Oregon National Guard member Alek Skarlatos, another American, Anthony Sadler, and a middle aged plus Brit, Chris Norman.
The two US servicemen grabbed the gun and wrestled him down. Stone had several serious cuts, including near loss of a finger. While this was going on the French train crew was supposedly finding a place to hide. (How many times do we have to pull these people's bacon out of the fire for them?)
The guy was a Moroccan, Ayoub El-Qahzzani, age 26, He had an AK47 with plenty of ammunition (how did he manage this in super gun control western Europe?)
He is quoted as saying he discovered the Kalashnikov automatic rifle 'under a bush' in a Brussels park, and that he found the guns and took them into the train toilet to understand how they worked, not to carry out an atrocity. And if you believe that, I have some shares in the Golden Gate bridge I would like to sell.
It appears that he was already being watched by the Spanish police.
I don't think it a good idea to publish these people's names as who knows what form of retribution these maniacs may try to put on those that thwart their plans, but they were in the newspaper.
In another article on Yahoo, the Brit was described as an accountant, born in one of the British colonies in southern Africa, now living in the south of France with his wife and a couple of grandchildren.