Robert Downey, Jr. presents 'Iron Man' bionic arm to 7 year-old

7 year-old Alex, who was born with a partially developed right arm, got the surprise of a lifetime when "Iron Man" actor Robert Downey, Jr. presented him with his own bionic arm. For the full video, please visit: https://www.youtube.com/watch?v ... more Duration: {{video.duration.momentjs}}