Lam Tak-fai, the Acting Head of Ports and Maritime Command, holds up a rhino horn in Hong Kong
Lam Tak-fai, the Acting Head of Ports and Maritime Command, holds up a rhino horn at Hong Kong's Customs and Excise Department Offices in November 2011. US investigators say more arrests are on the way as a new task force sets its sights on organized crime players that experts say is driven by smugglers from Ireland, China, Vietnam, the US and elsewhere.