https://apnews.com/e7289db8aabcaf9a7ce8910f83954720 > DALLAS (AP) — Several leading U.S. airlines warned Thursday that the rise in COVID-19 cases due to the delta variant is hurting their bookings and further delaying a recovery for the travel industry. > American Airlines said a slowdown that started in August has continued into September, and the airline further lowered its outlook for third-quarter revenue.