The Navy SEALs are known as the toughest warriors of the Thai fighting forces.   But even their most grueling training apparently didn’t prepare them for what they had to encounter at Tham  Luang  cave when they were called upon to save the lives of 12 young footballers and their coach trapped inside. SEAL Commander Rear Adm Arpakorn Yookongkaew admitted in an interview with Thai PBS that while his men were fully committed to the mission, there were moments of uncertainty and doubts plaguing the rescue operation.