Overseas visitors appear somewhat more hesitant about traveling to London in the wake of the attacks on the city's transit system in July, reports say. Though fears of mass cancellations haven't materialized, experts say future bookings could decline. Many adults in France, Britain and Germany are putting off travel to London, one survey found, but airfare comparison Web site Cheapflights said the city remains the fourth-most popular destination among U.S. users of the cheapflights.com site.

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