president donald trump is considering pardoning whistleblower edward snowden tsang he's heard strong arguments for and against snowden is living in exile in russia in faces criminal charges over his leak of classified documents that revealed widespread u.s. government surveillance. this is d.w. news from berlin follow us on twitter on instagram at the w. news over is it our website w dot com. after year they're drawn back to this place by the millions. these terrible better known as robot civil flying foxes frog 2 a little forest in zambia. it's thought to be the world's largest mammal migration. and one of africa's greatest unsolved mysteries. researchers from germany trying to learn.