One of the conjoined year-old twin girls who underwent separation surgery at Johns Hopkins in Baltimore has died. A spokeswoman for the Children's Center in Baltimore says Lea and Tabea Block from Germany were successfully separated at 12:15 this morning Eastern time. But, Tabea died after an exhaustive resuscitative effort. The spokeswoman says Lea is recovering in the hospital's pediatric intensive care unit. She's in critical but stable condition and said to be "doing well." Surgeons resumed efforts yesterday to separate the twin girls joined at the head, after halting the procedure four days ago when the condition of one girl became unstable.