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The US Navy is quietly pushing ahead with a radical new cannon that one day could transform how wars are fought, even though some Pentagon officials have voiced concerns over its cost and viability. Named the railgun, the weapon in question represents a paradigm shift in ballistic technology. Instead of using gunpowder and explosive charges to shoot a shell from its barrel, it employs vast amounts of electromagnetic energy to zoom a projectile along a set of copper-alloy rails.
HONOLULU (AP) — As the largest international gathering of coral reef experts comes to a close, scientists and policy makers are moving ahead with plans for action to save the world's reefs, which are being rapidly damaged.
The U.S. Supreme Court on Thursday blocked President Barack Obama's plan to spare millions of immigrants in the country illegally from deportation in a split ruling that heartened political foes who had accused him of overstepping his powers. The 4-4 ruling, coming seven months before Obama's term in office ends, marked the latest success that his Republican adversaries have had in thwarting a major policy initiative of the Democratic president. Obama had hoped that overhauling the U.S. immigration system and resolving the fate of the estimated 11 million people in the country illegally would be part of his presidential legacy.