-Cold, hot.

-Cold, hot. OK. Brilliant! Yes, for the curtain. There is where it'd come from. He might be semi-guard for the whole night.

The train to Cairo tracks close to the Nile. The greenery of irrigated crops means it's easy to forget that Egypt is one of the driest countries on the planet. 95 percent of Egyptians live on a narrow ribbon of land alongside the river that constitutes any 5 percent of the country. And Egypt's population has soared in recent decades. Much of the growth is being in Cairo, which in the last 50 years it's seen its population triple to more than 18 million and still rising fast. -This city is absolutely rammed. There're some predictions that say by 2050 there will be nearly 40 million people in Cairo. 40 million!