Kendrick Lamar kicks off Grammys with powerful performance

In this Sunday, Aug. 27, 2017 file photo, Kendrick Lamar accepts the award for video of the year for “HUMBLE.” at the MTV Video Music Awards at The Forum in Inglewood, Calif. Four of the five album of the year nominees at the 2018 Grammys are rap and R&B-based albums from black or Latino artists, including Lamar. (Photo by Chris Pizzello/Invision/AP)

NEW YORK — Kendrick Lamar kicked off the Grammy Awards with a powerful and poignant performance featuring video screens displaying a waving American flag behind him, as background dancers dressed as army soldiers marched and moved behind.