LA GUAIRA, Venezuela (AP) — The situation has grown more desperate by the hour in Venezuela as people dig through the rubble of collapsed homes and apartment buildings three days after the devastating one-two punch of 7.2 and 7.5-magnitude earthquakes , knowing time is running out to find survivors. Authorities announced Friday night that they would block access to La Guaira, the epicenter of the destruction, as chaos and traffic began to hamper search efforts. Officials said anyone who wants