Sniffer dogs and members of independent Dutch rescue group Reddingshonden RHWW prepare before the second day of a search for two missing Dutch tourists in Boquete May 28, 2014. Volunteers and sniffer dogs arrived in Panama from the Netherlands to aid in the search for Lisanne Froon and Kris Kremers. Froon, 22, and Kremers, 21, reportedly went missing on April 1 in Boquete, Chiriqui province, after setting out on a hike. The tourists were in Panama studying Spanish and were reported missing by their host families, according to local media. REUTERS/Carlos Jasso (PANAMA - Tags: SOCIETY ANIMALS)