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CANBERRA, AUSTRALIA: US Secretary of State Warren Christopher (L) and Australian Foreign Minister Gareth Evans (2ndR) watch as US Ambassador to Australia Edward Perkins (2ndL) and Australian Environmental Protection Agency head Barry Carbon shake hands after signing an environmental agreement between the US and Australia 08 March 1994 in Canberra, Australia. (Photo credit should read POOL/AFP via Getty Images)

CANBERRA, AUSTRALIA:  US Secretary of State Warren Christopher (L) and Australian Foreign Minister Gareth Evans (2ndR) watch as US Ambassador to Australia Edward Perkins (2ndL) and Australian Environmental Protection Agency head Barry Carbon shake hands after signing an environmental agreement between the US and Australia 08 March 1994 in Canberra, Australia. (Photo credit should read POOL/AFP via Getty Images)