Global Markets Waver After Another Strong Day on Wall Street

Elon Musk's SpaceX capsule arrives at the International Space Station, and Tesla is set to join the S&P 500. Airbnb reports a quarterly profit as it prepares for an IPO. The CEOs of Facebook and Twitter will testify in a Senate hearing. Keith Collins reports. Learn more about your ad choices. Visit megaphone.fm/adchoices