Johan Nicolaas Block was a Dutch aviation pioneer. He was the co-founder of Martinair, founder of Transavia and Air Holland. John Block was born as the son of a schoolteacher in Amsterdam. After the second world war he applied for a job with KLM but wasn't hired. He joined the Dutch airforce and became an airforce pilot. After his service he briefly worked with a radio division of the Dutch postal services and obtained his commercial aviation licence. Wikipedia
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