Relatives estimate up to 50 people were in the building along Avenida Alvaro Obregon in west-central Mexico City when the quake hit Tuesday. Family members have waited nearby ever since -- some of them staying overnight in tents -- monitoring the search and hoping for the best. Similar scenes have been playing out across central Mexico as volunteers joined trained search and rescue workers to try to reach possible survivors and clear rubble, days after the quake that officials say killed at least 286 people. Navarro, who believes his brother, Jesus, was in the building at Avenida Alvaro Obregon, said...