Democratic Senator Bernie Sanders dropped out of the race for US president.
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Clint Eastwood was elected as Mayor of Carmel, California.
The first person in the world to be diagnosed with Alzheimer's died.
Researchers discovered that as many as 600 million birds die in the US every year after flying into skyscrapers.
NASA's Discovery space shuttle launched on mission STS-56.
Construction of the Bahrain World Trade Center was officially completed.
