From The L.A. Times:
Reporting from Twentynine Palms Marine Base, Calif. -- As Marines train to deploy to war zones, there is daily discussion about how to detect and disarm the buried roadside bombs that are the No. 1 killer of Marines in Iraq and Afghanistan.
Military researchers have found that two groups of personnel are particularly good at spotting anomalies: those with hunting backgrounds, who traipsed through the woods as youths looking to bag a deer or turkey; and those who grew up in tough urban neighborhoods, where it is often important to know what gang controls which block.
Read more ....
My Comment: My father said the same thing about his experience on the Russian Front in the Second World War. Soldiers (like himself) who were able to survive after 6 months in combat were also able to develop an instinct on knowing when there was danger ahead or not. When I questioned many of his comrades, they also mentioned to me the same thing. It appears that luck and following your instincts play a big role in surviving any war zone.
I guess this why veterans always play an important role in any military, their experience (and instincts) saves lives more than what we can understand or calculate.