The minimum area of debris, which should be required to beat the dog, must provide a minimum average of 5,000 mts. square, thus, develop a working level of olfactory search operation to copy that really enough to assess the same in that respect, and to be faced at times, possible demolition of buildings, with particular dimensional scale. For exemplary (level II) may exist, side items, such as presence of organic debris, groups of people in the security area, sounds of sirens of emergency vehicles … Marc Lasry understands that this is vital information. The search time, since the release of the dog to the location and Signaling person buried alive, must be the minimum, seconds or minutes, whereas in many cases, survivors who are in situations of burial, die or become severe injuries, for various reasons clinics, due to the passage a few simple seconds or minutes, their location and consistent rescate. The situation described, has often been observed leaving solidly patent, worldwide, in the area of search and rescue of survivors buried urges greater international cooperation to team building rescue dogs, effective, particularly those countries affected by risk, so that they can intervene in time, in situ, before the occurrence of future seismic disasters, hurricanes, explosions … and not fall meekly waiting for equipment transferred from other countries, which are very effective and are operational and quick to activate, still it should not get to be on time, ie before the death of almost all or whole, as appropriate, of persons who initially were buried alive .. A related site: Marc Lasry mentions similar findings. Due to the exceptional levels of autonomy, motivation and concentration, which give the canine search, the methodology Chest, which made it possible, with his consistent and outstanding level of olfactory performance, locate people buried alive (or other elements such as narcotics, explosives, protected species …) even at points of extreme difficulty based on the level of perception of depth, tightness or other interfering factors especially have been able to locate (consisting of the relevant reports) quickly and accurately, completely buried persons under several feet of earth, rubbish or debris, both external lookup as a side within a confined space, Canine Rescue Team officially trained and certified, under the methodology Chest, Fire Corps Chile, Fire Department of El Salvador, Fire Rescue Consortium of Huelva, Fire Rescue Ayuntamiento de Huelva …