The capture and analysis of surveillance footage has been an indispensable tool for U.S. counterterrorism and law enforcement in the past decade. Video analysis software has improved since the 9/11 terrorist attacks -- it can be programmed to identify…
By PBS NewsHour
With a handful of primaries behind them and Super Tuesday fast approaching, presidential candidates have stumped and debated and cheered until their throats were sore and their voices hoarse.
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