[ivconic]

"...Read history for to learn... read!!! Many things invented today are simple sofistication of the same invented in the past..."

Relly!???
You don't say...!?

Esteban i know what you are aiming on.
If use of dogs was such good solution than we would'nt have so many explosions around the world.
...
Many things can be done in certain conditions, but also failed to be done in other conditions. Pitty.
Without most advanced technology we could not be sure and expect constant success and security.
Dogs are still good in locating drugs, no doubt on that.