I'm a major fan of the Voyager project and remember vividly the pictures of Saturn when I was in high school. The engineering involved is impressive, in any context. I'd just like to point out that depending on the definition of space, solar system or which of the two Voyagers we are talking about, this event has occurred quite a few times now in the press. A quick Google search of news reveals at least this many announcements about reaching the "edge of space."

2008: http://www.space.com/5586-voyager-spacecraft-reveals-solar-system-edge.html

2009: http://blogs.discovermagazine.com/80beats/2009/12/29/near-the-edge-of-the-solar-system-voyager-2-finds-magnetic-fluff/

2010: http://www.telegraph.co.uk/science/space/8201280/Voyager-1-reaches-edge-of-solar-system.html

Space, unfortunately, is the "next" battlefield. China with its small military budgets and limited means -- currently -- has identified our communications systems as a fatal flaw in our military operations. The modern battlefield includes heavy use of satellite imaging, real-time mapping, communications jamming, coordination with tactical centers often far removed from the front lines. Prestige is important motivation in becoming the third country to put a person in space but getting stronger in space military applications is the key strategic objective. It's the only way to compete with the US militarily in the near-term. This military angle should be an important consideration for the US side regarding any agreement on cooperation in space.