1. At least four members of a Thai soccer team have been brought out alive, officials said. Divers began the extraction attempt in a race against the threat of rains, which could make an already difficult rescue impossible. The 12 boys and their soccer coach had been stranded in the flooded cave since June 23. Above, medics took the rescued children to a helicopter.

We examined the cave complex and the logistical challenges the rescuers face.