20According to settled case-law, events may be classified as ‘extraordinary circumstances’ within the meaning of Article 5(3) of Regulation No 261/2004 if, by their nature or origin, they are not inherent in the normal exercise of the activity of the air carrier concerned and are outside that carrier’s actual control (see, to that effect, judgments of 22 December 2008, Wallentin-Hermann, C‑549/07, EU:C:2008:771, paragraph 23, and of 4 May 2017, Pešková and Peška, C‑315/15, EU:C:2017:342, paragraph 22), since both conditions are cumulative (judgment of 17 April 2018, Krüsemann and Others, C‑195/17, C‑197/17 to C‑203/17, C‑226/17, C‑228/17, C‑254/17, C‑274/17, C‑275/17, C‑278/17 to C‑286/17 and C‑290/17 to C‑292/17, EU:C:2018:258, paragraph 34).
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