And the impossible climb made possible. Two free climbers scale the sheer rock face of el captainitan in oweYosemite National park. Hello. Thanks for joining us. This is an infrared satellite image of the nigerian town of baga. Its been released by Amnesty International to show the scale of destruction after an attack by boko haram militants last week. Well amnesty says that 620 buildings in the town were damaged, a lot of them completely destroyed. I want to give you a clearer picture as to whats happened here. This is the image from the second of january, so ahead of the attacks. Overall, lots of vegetation. You can probably see the buildings in between there. If we now mix through to the scene after the attack the buildings have all gone. Not much vegetation left either. But essentially razed to the ground. The officials in the northeastern border states say that attack killed 150 people. Other reports, though put the death toll as high as 2,000. Its just one attack among a whole ca