and following weeks after collective weeks of mourning and trauma. there is tension. with no americans held by hamas released pressure mounts on president biden. i m in nantucket where president biden is closely tracking developments with his national security team, what he s doing to secure the release of americans being held by hamas! plus, travel crush, millions of americans head home after thanksgiving, the busiest day at airport still to come with weather threatening some travel plans. > tis the season, the hold shopping season begins in the lines and at the mall. reporter: and their buying power this year. tree supply. is there reason to worry. reporter: i m michael jordan in new york, how drought are impacting christmas trees this holiday and why you may want to buy early. later, a graduation first, a top 10 university awards degrees to inmates learning in lock-up. i asked your mama, how did i do? this is the cbs weekend news from washington with
Lab near boston, massachusetts, but font s week weekend journal we take you there to find out what this remarkable discovery could mean for all of us. reporter: inside this lab at the allen discovery center at tufts university, scientist douglas blackiston shows me the petri dish where xenobots also known as robots live, they are robots but not made of metal and circuit boards. why do they call them robots when it really feels like it is just a small very, you know, organism. they are robots because they are designed and engineered from the ground up to behave in very specific ways. these are returned to the original conception of the word robot which is just a worker made out of living tissue. sam creedman son a team of three other researchers who have been working on this project since 2018. a closer look through the microscope shows tiny uniquely