On Sunday, Sen. Marco Rubio (R-FL), Vice Chair of the Senate Intelligence Committee, appeared on ABC’s “This Week” with host George Stephanopoulos to discuss the ongoing Russian invasion of Ukraine.

During the segment, Stephanopoulos brought up the idea of a “no-fly zone,” which Ukrainian President Volodymyr Zelensky has asked for from multiple nations.

Rubio responded, succinctly explaining the impact that the United States declaring a no-fly zone over Ukraine would have — flying Airborne Early Warning and Control (AWAC) system planes over the country, shooting down Russian airplanes, and even taking out anti-aircraft systems.

“So basically a no-fly zone — if people understood what it means, it means World War III,” the senator said before noting that the U.S. can provide support in other ways.