British police are literally leaving no stone unturned in their probe of his death, creating a two-mile-long blockade around the mansion, and searching the property for chemical, biological and nuclear materials.

FORBES: Did Boris Berezovsky Kill Himself? More Compelling, Did He Kill Forbes Editor Paul Klebnikov

Jim Stone, executive director of walking-advocacy group WalkSanDiego, says he has found Google can say a mile will take anywhere from 15 to 30 minutes, depending on the details of the route.

WSJ: Timing an Urban Stroll Isn't a Walk in the Park