"Angola" . . "United States" . . . . . . . . . . . "U.S. Policy in Angola: a Case of Nonconstructive Engagement" . . . . "US policy in Angola : a case of nonconstructive engagement" . . . "US policy in Angola"@en . . . "U.S. policy in Angola : a case of nonconstructive engagement"@en . "United States policy in Angola"@en . "U.S. policy in Angola : a case of nonconstructive engagement" . . . . .