In Rio de Janeiro, surgeons separated 3-year-old conjoined twins Arthur and Bernardo Lima in June. When the twins were born, they were attached at the head, their brains intertwined. Separating them would require dozens of complicated surgeries. To prepare, the twins’ doctors in Rio used 3D printed models of the kids’ brains and they practiced the surgeries in virtual reality, using goggles and controllers while connected to another medical team in London that had done this before. Marketplace’s Marielle Segarra speaks with Noor ul Owase Jeelani, a pediatric neurosurgeon at London’s Great Ormond Street Hospital. His team led the VR training, and then he flew to Brazil to be one of the lead surgeons on the case.