He also said the 2012 mass shooting at Sandy Hook that left 26 people dead, including 20 children, never happened.
Mr Jones has now repeated his comments, including about what he says never happened at the elementary school in Connecticut, in an interview to NBC’s Megyn Kelly.
She said he had made his reputation by spreading conspiracy theories, including the claim that Sandy Hook did not happen.
More than 1,000 runners climbed the 1202 stairs, and 222 meters of height in the Frankfurt Messeturm skyscraper run AP.
“Any time you give someone like Alex Jones a platform, their followers will double-down or increase their attack on grieving families,” she told the Associated Press.
Ms Kelly has reportedly defended the decision to interview Mr Jones by saying it her job to “shine a light”. »