For the eleventh year running, this is the most difficult place on earth to be a Christian. One of the few remaining Communist states, it is vehemently opposed to religion of any kind. Christians are classified as hostile and face arrest, detention, torture, even public execution. There is a system of labour camps including the renowned prison No. 15, which reportedly houses 6,000 Christians alone. But despite severe oppression, there is a growing underground church movement of an estimated 400,000 Christians.