The practice of locating natural gas and petroleum deposits has been transformed dramatically in the last 20 years with the advent of extremely advanced, ingenious technology. In the early days of the industry, the only way of locating underground petroleum and natural gas deposits was to search for surface evidence of these underground formations.
Thumb Safety. No, the problem with a Thumb Safety is it's a Minor Motor Skill the way your brain see's it. Under a stressful situation you may loose all minor motor skills. All my guns I train with and I train consistantly, do not have any safeties.
As mandated in some USA states, some models come with an external safety. The Modular Handgun System (MHS) (now known as the M17) version of the P320 has an ambidextrous thumb safety. Law Enforcement and Military versions can also be equipped with a tabbed safety trigger on request. Trigger system