A video played in a courtroom Friday reveals a dangerous midday scene on a Milwaukee street: young men brazenly waving guns and large stacks of cash before the camera, boasting about selling drugs and threatening to shoot at police if officers come down the stretch. Meanwhile, children can be seen sitting on a stoop watching the scene unfold at N. 32nd St. and W. Auer Ave. At the beginning of the video, a man with what appears to be a MAC-10 assault-style rifle slung around his neck says: "It's MAC-aroni time. Police gonna get shot at, too." There are no...