Source: Michael Fletcher, Washington Post ( Free Registration )

Even as the economy slowly improves, the vast majority of Americans remain deeply worried about their ability to achieve a secure retirement, according to a new survey.

The poll, to be released by the National Institute on Retirement Security (NIRS) at a conference on Tuesday, found that 55 percent of Americans are “very concerned” that the current economic conditions are harming their retirement prospects. An additional 30 percent reported being “somewhat concerned” about their ability to retire.

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