the weak areas on their skulls. but overall, he is delighted with their progress. >> i think they are very happy children right now. mohamed is more outgoing because he's moving more and making a lot of noises. but ahmed is overcome with shyness. he's getting more and more social. >> stand up. the right foot forward. >> and the boys are making great strides with their physical therapy. >> good boy. >> this was ahmed when he got off the airplane in cairo. this is him two years later. >> go. go. go. >> in the past, ahmed cannot take steps. now he can walk about 10 to 20 feet without support. up, down. >> the change for mohamed has also been dramatic.