Philippine rescuers raced Tuesday to reach some two-dozen people still feared buried under a building near Manila that collapsed a day earlier in a deadly earthquake, as a powerful second tremor hit the nation.The United States (US) Geological Survey put the second quake – on the central island of Samar – at 6.4 magnitude, stronger than the one that wrought significant damage Monday near the capital in the north.The latest quake sent terrified locals fleeing into the streets, with the authori