Part 5: Is "Dancing with the Stars" (@Dancing with the Stars #DWTS) really THAT hard? USA TODAY's Anna Kaufman put the question to the test.    To get a closer look at the one of the most popular shows on network television, we sent Anna to train with pro Brandon Armstrong (@Brandon Armstrong) and perform a salsa.   In Part 6, Anna speaks with Mark Ballas (@Mark Ballas) and Whitney Leavitt (@Whitney Leavitt) on how it went. #DWTS #DWTS20 #salsa