New technology helps search teams find people in wilderness

HONOLULU -- Yesenia D'Alessandro loaded a GPS tracking app on her cellphone and trudged into a remote Hawaii forest, joining more than 100 other volunteers looking for a missing hiker. She climbed through muddy ravines, crossed streams and faced steep drop-offs in the thick tangle of trees and ferns where her college friend Amanda Eller vanished last month. "You have to search everywhere," said D'Alessandro, who flew in from Maryland. "You have to go down to that stream bed, even though you don'