Kemba Walker speaks with the media during Team USA basketball's training camp ahead of the World Cup. Kemba talks about playing for Gregg Popovich and with Celtics' teammates Jaylen Brown, Marcus Smart and Jayson Tatum. ✔ Subscribe to ESPN+ https://plus.espn.com/ ✔ Get the ESPN App: http://www.espn.com/espn/apps/espn ✔ Subscribe to ESPN on YouTube: http://es.pn/SUBSCRIBEtoYOUTUBE ✔ Subscribe to ESPN FC on YouTube: http://bit.ly/SUBSCRIBEtoESPNFC ✔ Subscribe to NBA on ESPN on YouTube: http://bit.ly/SUBSCRIBEtoNBAonESPN ✔ Watch ESPN on YouTube TV: http://es.pn/YouTubeTV Exclusive interviews with Rachel Nichols https://urlzs.com/jNURe Stephen A. Smith on ESPN https://urlzs.com/W19Tz ESPN on Social Media: ► Follow on Twitter: http://www.twitter.com/espn ► Like on Facebook: http://www.facebook.com/espn ► Follow on Instagram: www.instagram.com/f/espn Visit ESPN on YouTube to get up-to-the-minute sports news coverage, scores, highlights and commentary for NFL, NHL, MLB, NBA, College Football, NCAA Basketball, soccer and more. More on ESPN.com: http://www.espn.com