Survivor search grips a grieving Beirut a month after blast

A woman stands on her balcony Friday as she looks at rescuers searching at the site of a collapsed building in Beirut, Lebanon. A pulsing signal was detected Thursday from under the rubble of a Beirut building that collapsed during the horrific port explosion in the Lebanese capital last month, raising hopes there may be a survivor still buried there. (AP Photo/Bilal Hussein)

BEIRUT — People throughout Lebanon observed a moment of silence Friday to mark one month since the devastating Beirut explosion, while rescuers dug through the rubble of a building destroyed in the blast, hoping to find a survivor.