The 2007 shooting at Virginia Tech demonstrated the importance of strengthening background checks to ensure that guns are not sold to people who cannot legally buy them, U.S. Vice President Joe Biden said Friday. Biden spoke to reporters after he led a two-hour roundtable discussion at Virginia Commonwealth University about what to do in the wake of last month's elementary school shooting in Connecticut. Other President Barack Obama administration officials and a few people who served on a Virginia task force that made recommendations after the Virginia Tech shooting that left 32 people dead participated. "It's a national tragedy and a window into the vulnerability people feel about their safety and the safety of their children," Biden said of the Connecticut shooting.