Amazon looks to expand Alexa's world amid growing privacy concerns

Alexa has had a lot of explaining to do. Since Amazon's voice assistant debuted in 2014, the company has convinced millions of people to invite Alexa into their homes. They use it to play music, serve up the news and answer trivia questions. This year, though, the online retailing giant faced a backlash after news broke that human reviewers were sometimes listening to recordings of users' private conversations with Alexa. Those privacy problems will likely cast a shadow on Amazon's annual product launch, which takes place Wednesday in Seattle. There, the company is expected to unveil the latest devices in its Alexa-powered Echo speaker lineup.