Republican Sen. Ted Cruz convened a subcommittee hearing Tuesday to dispute the validity of research from climate “alarmists,” whose findings have become central to crafting environmental policy.

Cruz used his opening remarks to detail the 2013 expedition where a ship of 74 people sent into Antarctica to research climate change got stuck in ice, forcing an airlift rescue a week later.

“This expedition was there to document how the ice was vanishing in the Antarctic, but the ship became stuck,” Cruz said before the Senate Commerce Subcommittee on Space, Science and Competitiveness. “It had run into an inconvenient truth, as Al Gore might put it.”

Cruz, who chairs the subcommittee, also noted Secretary of State John Kerry’s 2009 claim that the Arctic would be “ice-free” by the summer of 2013—which was the same year the researchers became trapped in ice.