down in the valleys, the guardia civil yield are on patrol -- the guardia seville are on patrol. the laser wire glints menacingly in the sun. infrared cameras offer and -- often register large group of people in the early morning hours. hundreds of migrants come down around the mountain in an attempt to take the border by storm. spurred on by desperation, they try to climb the high fence. they've got nothing to lose. those who make it over are brought to the detention camp. they believe the dreams of europe have been fulfilled. the recent large-scale assaults have become a nightmare. the camp is massively overcrowded. the spanish authorities blame traffickers for the problem, and they reject criticism of the fence, which they say is protecting europe. >> there's a lot of hypocrisy. they defend the border and carry out the law. those who enter spain illegally are breaking the law. >> we are back in morocco, this time close to the spanish enclave. men from cameroon take us to their camp. most have been living here for more than a year. they comb the trash from nearby villages in se