It was just like old times, sort of. On Thursday, NSA whistle-blower Edward Snowden got together again with journalist Glenn Greenwald and filmmaker and journalist Laura Poitras to talk surveillance, reliving in a sense their now historic secret meeting two summers ago in a Hong Kong hotel room. That first time around, Snowden handed the two a huge cache of top secret National Security Agency documents and asked them to let the public know about the NSA's gigantic and constitutionally questionable appetite for people's data. The meeting set off a chain of events that led to, among other things, consternation...