Watch the ServiceNation Summit live, right here.

The two Presidential candidates, John McCain and Barack Obama, will be live on camera tonight; right now, John McCain is on. Interestingly, he offered an alternative scenario for how he would have responded to the national outpouring of community spirit after the September 11 attacks seven years ago, speaking of channeling America's desire to aid its own into more productive channels than the incumbent he is seeking to succeed. George Bush, of course, memorably told Americans that their duty to their country was a trip to the mall.

(Update): Another interesting juxtaposition: Senator McCain just chided Columbia University for barring military recruiters from its campus, a position not uncommon among major universities. The crowd inside the hall applauded; the crowd outside, hundreds of students (the campus is closed to the public) erupted in loudly articulated disfavor. Columbia bans recruiters due to the military's discriminatory Don't-Ask-Don't-Tell policy, which forbids gays and lesbians from openly serving in the ranks.