In the five days since Ethiopian Airlines Flight 302 crashed a few minutes after taking off from Addis Ababa, killing all 157 people aboard, regulators around the world have grounded the Boeing 737 MAX 8. That’s a reaction to the fact that the circumstances of this disaster match those of Lion Air Flight 610, another 737 MAX 8, which crashed into the Java Sea in October, killing all 189 occupants.

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