Twins Conjoined at Head Now Separated: What Causes Rare Condition?

The 13-month-old boys, Jadon and Anias McDonald, were born with a condition called craniopagus, which means they shared a portion of their skull and brain tissue. The surgery to separate the twins required a team of 40 experts, and finished at 2:15 a.m. today (Oct. 14), according to a statement from Children's Hospital at Montefiore in New York, where the surgery was performed. "Well, we did it," Dr. James Goodrich, a pediatric neurosurgeon who led the surgery, told CNN.