In 2015, the atmosphere among the community of Brussels, Belgium was tense when the city was put under the highest level state of emergency immediately following the Paris attacks; however, internet cats were able to cut the tension by taking over the Twitter feed #BrusselsLockdown. The feed was designed to discuss operational details of terrorist raids, but when police asked for a social media blackout the hashtag was overwhelmed by internet users posting pictures of cats to drown out serious discussion and prevent terrorists from gaining any useful information. The use of cat images is a reference to the Level 4 state of emergency: the French word for the number 4, "quatre", is pronounced similarly to the word cat in English.