The prime minister of Vietnam was met by angry protests and sharp questions about human rights as he kicked off a historic week-long visit to America with a stop in Seattle yesterday. A contingent of about 300 Vietnamese emigres demonstrated outside a downtown hotel as the communist leader, Phan Van Khai, conducted a press conference inside, police said. A police spokeswoman, Christie-Lynne Bonner, described the demonstrators as "pro-democracy." Some critics of Mr. Khai carried banners denouncing the regime in Hanoi. The protesters shouted "Down with Communists" and some carried signs that read, "Khai Is Another Saddam Hussein," the Associated Press...