Do you know What Is the 10/40 Window?

The 10/40 Window identifies a section of the world map encompassing North Africa, the Middle East and Asia. It extends from latitude 10 degrees N to 40 degrees N of the equator.
In and around this rectangular area lives the world's least evangelized, most unreached people groups in terms of Christian missions. The countries in the 10/40 window are either officially closed or informally opposed to Christian ministry within their borders.

Citizens have limited knowledge of the gospel, minimal access to Bibles and Christian materials, and extremely restricted opportunities to respond to and follow the Christian faith.
Although the 10/40 Window represents only a third of all global land areas, it is home to almost two-thirds of the world's population. This densely populated region contains the majority of the world's Muslims, Hindus, Buddhists and non-religious peoples, and the fewest number of Christ followers and Christian workers.

In addition, the highest concentration of people living in poverty—"the poorest of the poor"— reside within the 10/40 Window.
According to Window International Network, nearly all of the worst countries in the world known for persecution of Christians are positioned in the 10/40 Window. Likewise, child abuse, child prostitution, slavery, and pedophilia are widespread there. And most of the terrorist organizations in the world are headquartered there, too.