Monday on the NewsHour, the Obama administration reverses course on standardized testing in schools. Also: The WHO announced that the consumption of processed meats can raise the risk of cancer, what two teenagers’ lives tell about the cycle of violence…

Vice President Joe Biden will not join the presidential race, despite months of pondering the possibility. What drove his decision and how does it affect the other candidates in the race? Gwen Ifill gets perspective from Glenn Thrush of Politico.

Oct 21

Biden says he won't run for president in 2016

WASHINGTON -- Vice President Joe Biden will not run for president in 2016, he said Wednesday, ending a months-long flirtation with a third White House campaign and setting him on a glide path toward the end of his decades-long political…