The forced family separations at the US-Mexico border that occurred under a get-tough immigration policy by the Trump administration have opened up the floodgates of comparisons to dark periods of recent human history in the US and elsewhere.   We speak to a London-based human rights expert about whether the comparisons are fair, and the danger signs he sees in events in the US and Europe.     Meanwhile, Michelle Obama, speaking about her upcoming memoir "Becoming," offers words of inspiration to counter the very world events that are causing such dark comparisons.    (Photo courtesy: Romel Jacinto  / Flickr https://www.flickr.com/photos/37degrees/ )