Authorities announced Friday night that they would block access to La Guaira, the epicenter of the destruction, as chaos and traffic were hampering search efforts. LA GUAIRA, Venezuela (AP) — The increasingly desperate search for survivors i n Venezuela entered a third day Saturday as people dug through the rubble of collapsed homes and apartment buildings after the devastating one-two punch of 7.2 and 7.5 magnitude earthquakes , knowing time is running out. A mix of international rescue teams,