House Speaker Mike Johnson (R-La.) said there is no need for an investigation into the ground stop issued by the Federal Aviation Administration (FAA) on Friday, instead highlighting the need for “investment.”

“We don’t really need any investigation … we need further investment,” Johnson said during an interview with Fox News’s Saturday in America. “I mean, some of this equipment dates back to the eighties so it’s gotta be updated and that’s our responsibility. We’re gonna work to get it done.”

The FAA issued the nationwide ground stop around 4 p.m. EST on Friday. The rare protocol was in place for over four hours. The agency’s last widespread stoppage, which lasted approximately 90 minutes, was in January 2023.

More than 4,500 flights within, into or out of the U.S. were delayed as of Saturday afternoon with over 5,000 canceled, according to flight tracking website FlightAware. Total reported delays on Saturday crossed 15,000.