Chuck Grassley of Iowa cited reports that U.S. authorities were unaware Tsarnaev had left the country for Russia in January 2012 even though his name was misspelled on his airline ticket by Russian carrier Aeroflot, which would normally trigger increased scrutiny.

CNN: Bombing suspect not on terror watch list

He thinks further downside is limited with news flow increasing on carrier roll out of LTE networks, which theoretically should trigger a boost in sales of 4G wireless modems.

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