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Alcatraz is housing seven new works by Chinese artist and dissident Ai Weiwei.
Stop expecting American presidents to be great and allow them to be good, says historian.
Go inside the Emergency Operations Center at the CDC.
Atul Gawande: U.S. is not "going to have ebola outbreak running wild"
Military leaders are weighing what can be done to combat the Islamic State militants.
Miles O’Brien talks the continuing investigation and the NOVA report “Why Planes Vanish.”
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