By MARCIA DUNN CAPE CANAVERAL, Fla. (AP) — NASA declared the Mars digger dead Thursday after failing to burrow deep into the red planet to take its temperature. Scientists in Germany spent two years trying to get their heat probe, dubbed the mole, to drill into the Martian crust. But the 16-inch-long (40-centimeter) device that is part of NASA's InSight lander couldn’t gain enough