An immigration crisis unfolds, as families are separated as they attempt to cross the southern border into the U.S. After days of outcry from the public and politicians alike, President Trump signs an executive order which prevents family separation, but maintains his "zero tolerance policy." Plus -- the escalation of a trade conflict with China and the European Union, among other countries, continues as the U.S. rolls out more tariffs. CBS News Correspondent Bill Rehkopf will have these stories and more on the CBS News Weekend Roundup.