Shoot to Kill: Baltimore ranks as most lethal among nation's largest cities

SAM has made a Mars discovery

A discovery said to be "one for the history books" has been made by SAM, a suite of science instruments aboard NASA's Curiosity. Here, workers inside a clean room at the Jet Propulsion Laboratory in La Canada-Flintridge prepare to install SAM into the rover.
NASA/JPL-Caltech
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