Whales and dolphins have been held captive in marine parks long before SeaWorld. The movement to free killer whales is at a crossroads. SeaWorld has ended the breeding of the animals. But a marine park building boom in China is driving the capture of wild killer whales, dolphins, and beluga whales. TakePart’s journalists travel from the Pacific Northwest to Asia to report on plans to return captive killer whales to the sea—and stop a new wave of captivity.