Nation

Follow PBS NewsHour’s complete coverage of U.S. news, reports and analysis.

As French President François Hollande tightened security across France, promising "merciless" retribution for the series of coordinated terror in Paris Friday night, world leaders reacted with expressions of solidarity as well as increased vigilance in their own countries.

Friday on the NewsHour, multiple shootings and bombings explode across Paris. Also: How everyday racism can build to a tipping point, Mark Shields and Michael Gerson discuss the week’s news and the on-screen portrayal of the investigation that uncovered Boston’s…