Henry Heywood, Jr., a.k.a. Captain Steel was a soldier in the World Army.
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History
Henry Heywood, Jr. was born in the Philippines and suffered from a rare birth defect that would have caused his bones to crumble before he was eighteen. He was saved from his affliction by his scientist father Henry Heywood, Sr. who used a special metal alloy to make his bones stronger by binding with his DNA; however, it replaced the bones and some of his vital organs entirely, while imbuing him with super-strength and a mental control over machinery. Henry's father tried to turn in his work to the World Army, but he and Henry, Jr. were attacked by Apokolips's forces. Rather than have his work taken by the Parademons, Henry, Sr. took his own life and destroyed his documents.
After the Apokolips War ended, Henry Jr. joined the World Army and took the codename Captain Steel. He would go on to work with other agents like The Atom.