Jackhammer

Jackhammer(real name Chris Dan Barker) is the 66th member of the S-men.

Biography
Chris is a 47 year old superhero who retired way before the ban. He was the leader and former member of the first New Knights team. The government chose to use "Gamma 18" on him and his team in the hopes of increasing their individual abilities. However the exposure caused Chris's brother Jack to become evil and turn on him and his team. Chris managed to defeat Jack, by creating a vortex and sending him to a parallel universe. But as a result Chris lost most of his powers in the process. Eventually after 30 years Jackhammer was commissioned by Dr.Grant to select and train a new New Knights team. After a trial audition with many gifted youngsters four recruits were selected. At first Chris was against training the new team, because he believed that they should be living their lives as normal people.But he eventually came around and devoted most of his time to training the recruits properly. In doing so he came to realize that these kids were more than just a team, but a family. After completing their training Chris found out that Colonel James was going to use "Gamma 18" on the new recruits. Unwilling to accept this decision Chris attempted to escape the facility alongside the recruits. During their escape Dylan(Chris's son) found out that the true reason the Colonel wanted the team trained was so they could fight Jack, who was scheduled to emerge through a dimensional rift in the Desert. Knowing he would try to interfere the Colonel had Jackhammer arrested. but the recruits managed to help him, and they escaped the facility together. Jackhammer and the team then made their way to the desert where Jack emerged from the parallel universe, When they arrived Chris tried to reason with him, but Jack felt that his brother betrayed him and chose to attack. During their fight the new team approached Jack and Cindy's life was put in danger. Chris managed to save her and in doing so he regained his powers. Together Jackhammer and the new team managed to defeat Jack, and returned him to his normal self. After he joined the S-men

Personality
He is brave, brooding, romantic, withdrawn, quiet, sarcastic, outspoken, intelligent, blunt, secretive, resourceful, cheerful, easygoing, flirtatious, adaptable, humor, obsessive at times, selectively charming, cunning, and ambitious.

Powers
Super strength, super leaping, dynamic durability, super stamina, accelerated healing factor, nigh-invulnerability, super speed, can expand to the size and strength of a brick wall on command, gamma radiation/energy manipulation and emission and telepathic resistance.

Weakness
Despite being nearly invulnerable, he is shown to have an aversion to lava, suggesting he is not completely invincible and can be hurt and ultimately killed by molten substances like acid.