Iron Man, Iron Boy: New Arm Prosthetic From Robert Downey Jr.
Actor Robert Downey Jr. presented 7-year-old Alex Pring with a bionic arm. Watch more ABC News coverage: www.abcnews.com Subscribe to WN on YouTube: https://www.youtube.com/ABCNews Like WN on Facebook: https://www.facebook.com/WorldNewsTonight Follow WN on Twitter: https://twitter.com/wntonight
