It was very cold today like winter again, so will be tomorrow.
They say today is day of helicopter. It was established in 1986 by zen nihon koku jigyo rengo kai (全日本航空事業連合会), All Japan Air Transport and Service Association. It is decided for the birthday of Leonardo da Vinci in 1452. He thought of the theory of helicopter for the first time. The day is to let the people recognize the helicopter as the second transport of the air.
Talking of the transport of the air, I was surprised to know that the eruption in Iceland caused many cancellation of the flights around the world.
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