Aim higher, reach farther.  European Shares Drop on Economic
Fears  European stocks slid Thursday as worries about the global
economy mounted following Wednesday's downbeat comments by the
Federal Reserve and sharp declines in Greek government-bond
prices.  Asian markets were little changed, but Australian
mining shares climbed on optimism that the nation's new prime
minister, Julia Gillard, will soften the government's stance on
a controversial mining tax.  Sovereign-debt concerns remained
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