Ok, that's good Sosia, but I need more help.
how would you say it in the singular?
For example, in the Jason Bourne movies, the hit men (murderers) are called assets, as in "let's bring the asset up from Tangiers to kill him". Would you translate that with recurso? "vamos a traer el recurso de Tangiers para matarle". I don't think medio would work here.