All the happy tears.
The five-year war in Syria has killed at least 250,000 and wounded many more.
WHAT'S HAPPENING
The arm is helping children forget about their disabilities and just be kids.
Soon, scientists will begin human trials on brain-controlled bionic limbs.
Equipment -- prosthetic limbs, pacemakers -- designed specifically for children often lag five years to 10 years behind new technology for adults. Parents are pushing for that to change.