Hundreds of black and blue tarps, many with thatched roofs, vie for space in this port city’s migrant camp, a testament to the powerful flow of human migration across Europe this year. Camps like this are spurring some European nations to push for what they're calling burden sharing, particularly Italy and Greece. Unsurprisingly, many of the less affected countries are opposed, arguing they have neither the infrastructure nor the resources to house and care for asylum seekers.