As NAFTA talks grind on, thousands of skilled workers wonder if they will keep their jobs.

A Trade NAFTA or "T-N visa” allows citizens of Canada and Mexico to work in the US in a range of job categories. It could now be in jeopardy as the Trump administration seeks to renegotiate the trade agreement by the end of the year.

Also: There is a shortage of summer workers in Cape Cod, partly due to changes to a temporary worker visa program; as the US and China talk trade and tariffs, some in Shanghai wonder what it will mean for them; the end of Temporary Protected Status for some immigrants has an unexpected impact on US labour unions; plus we find out how TV reporter Lisa Howard changed the course of the Cold War.

(Image: Mexican Economy Minister Ildefonso Guajardo gives a message to the media during the seventh round of NAFTA (North American Free Trade Agreement) talks in Mexico City, on March 5, 2018. Credit: Ronaldo Schemidt/Getty Images)