Or at least that had seemed the most reasonable theory during the first couple of days that they had been reported overdue. Consequently the search-and-rescue efforts had been all about crisscrossing the region in light aircraft, looking for a crashed vehicle or a distress beacon, and scanning the radio frequencies on which they might send out a distress call. Phone coverage in most of the region was out of the question, but the Suburban had a citizens’-band radio, and presumably they’d fire it up and call for help as soon as they saw an airplane. Or heard one.