What does the death of Usama bin Laden mean?

In this 17 May 2011 article from the internal newsletter SIDToday, the NSA Signals Intelligence Directorate’s Associate Deputy Director for Counterterrorism, Jon Darby, decribes how the NSA played a “critical” role in the raid in bon Laden’s Abbottabad compound: see the Intercept article What the Snowden Files Say About the Osama Bin Laden Raid, 18 May 2015.