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Bump Fire Stock: How It Works
NBC News' Pete Williams explains how a bump fire stock device works and why it proved to be so deadly in the Las Vegas massacre.
Las Vegas Shooting
Police end Las Vegas massacre investigation with no idea of motive01:45
Las Vegas police: We don’t know why shooter committed this act01:32
Las Vegas victims speak out amid MGM hotel chain legal battle01:37
Mandalay Bay owner sues Las Vegas shooting victims01:44
Bodycam footage from Las Vegas shooter’s suite released02:29
Las Vegas body cam video shows officers in shooter's hotel room01:29