katty: rob watson there speaking to my colleague ros atkins. at least 19 people have been killed and 50 injured when it 2 pack express trains collided in pakistan. it happened at a station in karachi during morning rush hour. it was reported that one train was mistakenly given a green light, which sent it plowing into stationary train. prime minister nawaz sharif has ordered an inquiry. floated its currency, reducing its value almost -- egypt has floating its currency, reducing its value almost 50% against the dollar. the move is to meet conditions for $12 billion loan from the imf. the government hopes to boost foreign investment as it tackles a budget deficit. years of unrest have caused high unemployment, inflation, and a drop in tourist numbers. capital ofenya's nairobi avenue fired at protesters. hundreds of people have gathered to demonstrate against what they claim is government corruption. officials of the ministry of health are accused of stealing $50 million from a maternity program. the leader of so-called islamic state has reportedl

. >> as my friend rob watson has written and i have said so many times, a guy jumps off a building, hehinks he is flying. look at me, i am flying. it is a sudden stop at the end that tells you you're not. >> we are going that way, and we always will. and as soon as we run out of one thing, we learn how to live without that one thing. until it is mad max. that is what is going to happen. >> we are not looking far enough ahead, for instance, we are real good with two, three years ahead, but we are not very good with 100 years ahead. ♪ >> we are having such a huge effect, and we're not just quite. we're about a generation or two behind the curve, on how to deal with these things. and basically, like a child with matches, we might set ourselves on fire, which, in fact we are setting ourselves on fire. we are destroying the natural, the natural world -- overfishing the oceans, over-farming the lands, and just one thing after another, and the natural world on which we depend for our survival is collapsing around us, and if we do not change our ways immediately, our children and grandchildren