On the hunt for elephant poachers

Throughout the jungles and across the savannahs of Africa, elephants are being slaughtered in the devastating ivory trade. But in one national park, the poachers are the prey - as eco-guards patrol the jungle, on the hunt for them. CNN's Arwa Damon is on the ground in the Republic of Congo, with an extraordinary look inside the battle to stop the ivory trade and save the elephants.