This gold spoon was recovered from the Spanish shipwreck Nuestra Senora de Atocha and is shown in Palm Beach, Fla., in 2005. The 17th-century sunken Spanish galleon sank off the Florida Keys in 1622 while carrying copper, silver, gold, tobacco, gems, jewels, jewelry, and indigo from Spanish ports at Cartagena, Colombia, Porto Bello in New Granada, and Havana, bound for Spain. Libby Volgyes/Palm Beach Post/ZUMA Press/Newscom/File
Among the sunken treasure discovered on the Spanish shipwreck Nuestra Senora de Atocha are a gold disc (c.), a chain, and an emerald broach, shown in Palm Beach, Fla., in 2005. Libby Volgyes/Palm Beach Post/ZUMA Press/Newscom/File
This cross, made of 18 carat gold and set with seven high-quality emeralds from Columbia's famous Muzo mine, was found on the shipwreck Nuestra Senora de Atocha. Suzanne K. Mast Lee/Miami Herald/MCT/Newscom/File
These are some of the gold and silver Spanish coins found by John Brandon off Florida's Treasure Coast, shown in Ft. Pierce, Fla., in 2006. They came from a Spanish galleon fleet that sank in 1715. David Spencer/Palm Beach Post/ZUMA Press/Newscom/File
This gold chain with religious pendants found on March 23 by diver Bill Burt of Mel Fisher's Treasures. Mr. Burt was searching for the sterncastle of the Nuestra Senora de Atocha. Sharon Wiley/Florida Keys News Bureau/AFP/Getty Images/Newscom/File
A gold necklace from a shipwreck is shown at the Mel Fisher Maritime Museum in Key West, Fla., in 2001. DanitaDelimont.com/Newscom/File
Belgian treasure-hunter Luc Heymans holds an ancient gold dagger handle with an arabic inscription, part of a treasure haul brought to the surface from an ancient shipwreck, at a showroom in south Jakarta, Indonesia, in 2010. Romeo Gacad/AFP/Getty Images/Newscom/File
A gold cup belonging to a Tang Dynasty shipment is shown in Singapore in 2004. German sunken treasure hunter Tilman Walterfang found 60,000 artifacts in 1998 among the remains of an Arab 'dhow' dating back to the ninth century in what are now Indonesian waters. Roslan Rahman/AFP/Getty Images/Newscom/File
A seabed concretion with silver half dollars is on display at the exhibit SHIPWRECK! Pirates & Treasure at MOSI in Tampa, Fla., in 2007. The coins are from the shipwreck SS Republic, which was a sidewheel steamer headed from New York to New Orleans in 1865 with gold and silver coins intended to help rebuild the Civil War-ravaged South. A hurricane sank the ship, which was found off the Georgia coast. Zuma Press/Newscom/File
With Islamic State forces surrounding the Syrian Kurdish border town of Kobane, Kurds from across Turkey are demanding to be allowed to enter Syria to make a stand.
ByDominique Soguel, Correspondent
Hundreds of Kurdish men streamed into Syria from Turkey Monday, saying they hoped to defend a strategic border town from an onslaught by Islamic State, a jihadist group bent on expanding its so-called “caliphate” in Syria and Iraq.