VCU upsets UNC in first round of NCAA Tournament, while Duke survives against Siena

Paul Ihander & Max Goren recap the first round games of the NCAA Men's Basketball Tournament for UNC and Duke. The Tar Heels led the Rams of VCU by as many as 19 points in the second half- what went wrong to lead to their early exit from the tournament? How did Duke deal with a double-digit deficit against a 16 seed and manage to rally?