Everybody who’s been doing this as long as we have knows that the best games of the NCAA Tournament are found on the opening weekend, meaning the Saturday and Sunday of what used to be called the Second Round. In that round, you’ve gotten rid of most of the overrated pretenders, and you’re left with 32 teams that for the most part are really playing well at the end of the season. RTC Live will be back at the four regional sites today — Tampa, Washington, Denver and Tucson — with our correspondents reporting on the sights and sounds of each of the eight games around the nation. Join us for some conversation, questions, answers and what’s sure to be some great basketball all afternoon and late into the evening today.