The US is spending less and less on investigations. When the space shuttle Challenger disaster happened in 1986, the US government spent about $175 million US Dollars (USD) investigating the cause. When terrorists flew planes into the Twin Towers in New York on September 11, 2001, the government spent about $15 million USD investigating the disaster. In the financial crisis that started in 2008, only $8 million USD was spent investigating the problem.
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