Germany’s Frankfurt Airport faced serious disruption on Thursday, with some 270 flights cancelled out of 1,400, a spokesman told dpa, after Last Generation climate activists glued themselves to runways at the major European transport hub. By evening, all of the runways were open, the spokesman said, “Operations are running smoothly.” However, the impact of the protest was significant, with the terminals far busier than usual and lengthy queues at the rebooking counters. Police said several activists entered the site early in the morning and glued themselves in the security area, causing operat…