Climate activists recently sowed chaos at an airport in Munich, Germany. On May 18, members of the green group Last Generation crashed the gates and glued themselves to a runway in protest of government subsidies for flights.

Everything at the Munich airport ground to a halt, leading to flight delays and cancellations on the busy Whitsun holiday weekend. A few of the protesters, anticipating the ire of travelers, carried signs that translate to “Problem is the government, not our holiday,” according to Euronews.