 A strike is underway at South Korea's biggest firm. Amid calls for higher wages and other benefits, some workers at Samsung have declared an indefinite strike. The union accusing management of being unwilling to negotiate. Talks have been going on for months, but they've gone nowhere. The company says for now there have been no disruptions to production. Tom Rivers, ABC News, at the Foreign Desk. Microsoft has left its OpenAI board seat, saying its participation is no longer needed.