Photos: Marines drink cobra blood during survival training

A U.S. marine drinks the blood of a cobra during a jungle survival exercise with the Thai Navy as part of the "Cobra Gold 2013" joint military exercise, at a military base in Chon Buri province February 20, 2013. About 13,000 soldiers from seven countries, Thailand, U.S., Singapore, Indonesia, Japan, South Korea and Malaysia are participating in the 10-day military exercise. (REUTERS/Damir Sagolj)

A US Marine displays a cobra skin around his neck during a jungle survival program as part of the annual combined military exercises, Cobra Gold 2013, at a navy base in Sattahip on February 20, 2013. About 13,000 soldiers from seven countries, Thailand, U.S., Singapore, Indonesia, Japan, South Korea and Malaysia are participating in the 10-day military exercise. (PORNCHAI KITTIWONGSAKUL/AFP/Getty Images)

A U.S. Marine drinks the blood of a cobra during a jungle survival exercise with the Thai Navy as part of the "Cobra Gold 2013" joint military exercise, at a military base in Chon Buri province February 20, 2013. About 13,000 soldiers from seven countries, Thailand, U.S., Singapore, Indonesia, Japan, South Korea and Malaysia are participating in the 10-day military exercise. (REUTERS/Damir Sagolj)

A US Marine (front L) plays with cobra's tail during a jungle survival program as part of the annual combined military exercises, Cobra Gold 2013, at a navy base in Sattahip on February 20, 2013. About 13,000 soldiers from seven countries, Thailand, U.S., Singapore, Indonesia, Japan, South Korea and Malaysia are participating in the 10-day military exercise. (PORNCHAI KITTIWONGSAKUL/AFP/Getty Images)

A U.S. Marine drinks the blood of a cobra during a jungle survival exercise with the Thai Navy as part of the "Cobra Gold 2013" joint military exercise, at a military base in Chon Buri province February 20, 2013. About 13,000 soldiers from seven countries, Thailand, U.S., Singapore, Indonesia, Japan, South Korea and Malaysia are participating in the 11-day military exercise. (REUTERS/Damir Sagolj)

A U.S. Marine has a tail of dead cobra in his mouth during a jungle survival exercise with the Thai Navy as part of the "Cobra Gold 2013" joint military exercise, at a military base in Chon Buri province February 20, 2013. About 13,000 soldiers from seven countries, Thailand, U.S., Singapore, Indonesia, Japan, South Korea and Malaysia are participating in the 10-day military exercise. (REUTERS/Damir Sagolj)

A US Marine drinks cobra blood during a jungle survival program as part of the annual combined military exercises, Cobra Gold 2013, at a navy base in Sattahip on February 20, 2013. About 13,000 soldiers from seven countries, Thailand, U.S., Singapore, Indonesia, Japan, South Korea and Malaysia are participating in the 10-day military exercise. (PORNCHAI KITTIWONGSAKUL/AFP/Getty Images)

U.S. marines react as a cobra gets too close to them during a jungle survival exercise with the Thai Navy as part of the "Cobra Gold 2013" joint military exercise, at a military base in Chon Buri province February 20, 2013. About 13,000 soldiers from seven countries, Thailand, U.S., Singapore, Indonesia, Japan, South Korea and Malaysia are participating in the 11-day military exercise. (REUTERS/Damir Sagolj)

A Thai Navy instructor demonstrates to U.S. Marines how to catch a cobra during a jungle survival exercise as part of the "Cobra Gold 2013" joint military exercise, at a military base in Chon Buri province February 20, 2013. About 13,000 soldiers from seven countries, Thailand, U.S., Singapore, Indonesia, Japan, South Korea and Malaysia are participating in the 11-day military exercise. (REUTERS/Damir Sagolj)

A US Marine (front R) holds a cobra during a jungle survival program as part of the annual combined military exercises, Cobra Gold 2013, at a navy base in Sattahip on February 20, 2013. About 13,000 soldiers from seven countries, Thailand, U.S., Singapore, Indonesia, Japan, South Korea and Malaysia are participating in the 10-day military exercise. (PORNCHAI KITTIWONGSAKUL/AFP/Getty Images)

A US Marine holds a cobra skin during a jungle survival program as part of the annual combined military exercises, Cobra Gold 2013, at a navy base in Sattahip on February 20, 2013. About 13,000 soldiers from seven countries, Thailand, U.S., Singapore, Indonesia, Japan, South Korea and Malaysia are participating in the 10-day military exercise. (PORNCHAI KITTIWONGSAKUL/AFP/Getty Images)

A U.S. Marine drinks the blood of a cobra during a jungle survival exercise with the Thai Navy as part of the "Cobra Gold 2013" joint military exercise, at a military base in Chon Buri province February 20, 2013. About 13,000 soldiers from seven countries, Thailand, U.S., Singapore, Indonesia, Japan, South Korea and Malaysia are participating in the 11-day military exercise. (REUTERS/Damir Sagolj)

A US Marine (bottom L) drinks cobra blood during a jungle survival program as part of the annual combined military exercises, Cobra Gold 2013, at a navy base in Sattahip on February 20, 2013. About 13,000 soldiers from seven countries, Thailand, U.S., Singapore, Indonesia, Japan, South Korea and Malaysia are participating in the 10-day military exercise. (PORNCHAI KITTIWONGSAKUL/AFP/Getty Images)

US Marines eat insects during a jungle survival program as part of the annual combined military exercises, Cobra Gold 2013, at a navy base in Sattahip on February 20, 2013. About 13,000 soldiers from seven countries, Thailand, U.S., Singapore, Indonesia, Japan, South Korea and Malaysia are participating in the 10-day military exercise. (PORNCHAI KITTIWONGSAKUL/AFP/Getty Images)