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 PHOTOS: U.S. Marines drink cobra blood during survival exercise
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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

PHOTOS: U.S. Marines drink cobra blood during survival exercise

Tigers play at the Tiger Temple in Kanchanaburi province, west of Bangkok April 24, 2012. [REUTERS/Chaiwat Subprasom]

PHOTOS: The most-interesting photos of the past 24 hours

A fire engulfs huts in the Um-Piam refugee camp for refugees from Myanmar in Thailand’s Tak Province, 426 kilometers (265 miles) west of Bangkok February 23, 2012.  Um-Piam is the second largest refugee camp along the Thai-Myanmar border, which houses more than 15,000 Burmese refugees who fled the fighting between ethnic minority groups and the Myanmar government. More than 200 homes have been destroyed. [REUTERS/Stringer]
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A fire engulfs huts in the Um-Piam refugee camp for refugees from Myanmar in Thailand’s Tak Province, 426 kilometers (265 miles) west of Bangkok February 23, 2012. 

Um-Piam is the second largest refugee camp along the Thai-Myanmar border, which houses more than 15,000 Burmese refugees who fled the fighting between ethnic minority groups and the Myanmar government. More than 200 homes have been destroyed. [REUTERS/Stringer]

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 2012” (CG12) joint military exercise, at a military base in Chon Buri Province February 13, 2012.  About 14,000 armed forces personnel representing Thailand, U.S., Singapore, Indonesia, Japan, Malaysia and South Korea are participating in the three-week military exercise, which takes place every year in Thailand. [REUTERS/Chaiwat Subprasom] See more Reuters photography
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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 2012” (CG12) joint military exercise, at a military base in Chon Buri Province February 13, 2012. 

About 14,000 armed forces personnel representing Thailand, U.S., Singapore, Indonesia, Japan, Malaysia and South Korea are participating in the three-week military exercise, which takes place every year in Thailand. [REUTERS/Chaiwat Subprasom]

See more Reuters photography