Footage from bystanders of two fatal shootings of US citizen protesters, including Saturday’s incident that left an ICU nurse dead, has underscored the power of video in checking official statements t ...
Here's a look at the sleep-tracking technology — and why one expert thinks its full potential has yet to be realized.
From NBC News in Washington, the longest-running show in television history, this is Meet the Press with Kristen Welker.
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