From Curbed Chicago:

On Friday, Chicago Mayor Lori Lightfoot joined state, federal, and airline officials to break ground on an extension of one of O’Hare International Airport’s most heavily used runway. The $334 million project will add 3,000 feet to runway 9R/27L and improve passenger service by increasing O’Hare’s capacity to handle more frequent flights by larger, long-haul aircraft. (read more)