Associated Press
FILE - In this Nov. 27, 2014 file photo an electronic sign post warns tourists of extremely dangerous cocaine being sold to tourists on Rembrandtplein square in the center of Amsterdam. Authorities in Amsterdam announced Friday, Feb. 27, 2015 they are resuming a major public awareness campaign about potentially lethal white heroin that is being sold as cocaine after three Danish tourists became ill this week. Three people died and 17 became seriously ill late last year after inhaling heroin in Amsterdam. (AP Photo/Peter Dejong, File)

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