Adventurers who conquered Mount Everest successfully launched a replica of an ancient Philippine boat Saturday that they will use to sail around Southeast Asia and possibly to Africa to promote Filipino pride and unity.The replica of the balangay — a wooden-hulled boat used in the archipelago about 1,700 years ago — was built in 44 days by native Badjao boat-builders from the southernmost Philippine province of Tawi Tawi using traditional skills handed down through the generations.About 300 spectators counted down to the launch, cheering and applauding as the bow hit the water in Manila Bay. [...]