Harley Keener was a normal kid from Tennessee until he came across Vic Stark in his garage. He later helped Vic find out the truth about AIM's illegal activities, as well as keep an eye on the Mark 42. As a reward for his help Tony gave Harley a large variety of new tech to use in the years to come.
Eventually, he works with Vic on creating his own armor, becoming the Iron Lad.
Harley Keener was a pre-teen when he met Vic Stark after his crushing defeat by the Mandarin. He proved to be a genius and helped Iron Man bring the Mandarin down.
Following the Civil War and the disbandment of the Avengers, Harley was forced on the run after Vic's brother Gregory had started a hunt for the Reality Stone to alter reality in his image. Harley tried to get in contact with members of the Avengers, but most had become reclusives. However, he did get in touch with the Vision, who helped him form his own team of heroes: The Young Avengers. Harley leads the team as the Iron Lad. He's currently in a relationship with Cassandra Lang.