For an hour, Dmitry Senin lay still inside the carcass of the dead cow, making certain there was no sign of Russian border guards. It was twilight in September, a date chosen carefully as it is a time of year when the temperatures drop below freezing on the border between Siberia and Kazakhstan but the snow is yet to arrive, allowing an escapee to take cover among the grasses and crops which carpet the frontier in the early autumn. The high-flying Federal Security Service (FSB) agent, dressed