A helicopter ferries a tour boat into Crater Lake at Crater Lake National Park in Oregon. Park management will be evaluating how the noise affects the soundscape and park wildlife.
Republican presidential candidates debate in California on Sept. 7. NBC's Brian Williams says a moderator's persistence can reveal which questions candidates want to avoid.
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Writer Will Reiser, left, and actor Seth Rogen are the real-life friends behind 50/50, a comedy about cancer that grew out of the jokes that got the two through Reiser's own diagnosis and treatment.
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