Opinion: Tune in tonight: live-blogging the ServiceNational Presidential Candidates Forum

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Right now, John McCain and Barack Obama are paying their respects together at Ground Zero in New York City.

Later today, they will meet up at Columbia University to talk about community service at the ServiceNation Presidential Candidates Forum. The two will be questioned separately, Saddleback style.

We will be live-blogging tonight’s event, just like we did the Saddleback Forum.

Tune in around 7 p.m. EST.

-- Kate Linthicum