We can wake ourselves up by increasing our oxygen level by breathing deeply. Or conversely, we can put ourselves to sleep with a kind of meditation of shallow breathing, and repeating silently the words to the rhythmic "in" and "out" like a mantra.
Brandon Caro's debut novel, Old Silk Road, is an important, tough read, both for the dirt-under-its-nails portrayal of soldiers, and for a complex plot that rewards a reader with insights into America's longest war, in Afghanistan.
The ever-present danger is what makes BASE jumpers the most extreme athletes in the world. Many people call them daredevils; most people call them crazy. They know there's a good chance they'll die, but that's what makes them feel alive.