It’s one of the biggest migrations on earth. More than 1.5 million Venezuelans have fled their homeland since 2015. Most head to Colombia in the hopes they can find jobs and food for their families. But the influx of the mass migration is putting serious strain on Colombia’s resources. And while the United Nations struggle to find ways to assist, the wave of humanity continues to pour over the border. CBC's Adrienne Arsenault takes viewers to the border to see the mass exodus first hand, and the impact it is having on the people and Colombia.