Speaking in public

El cierre de la intervención is the end of somebody's turn to speak, and la intervención goes in three directions English does not follow. At a conference it is what one person contributes: su intervención duró diez minutos. In a hospital it is an operation — una intervención quirúrgica, and lo intervinieron del corazón means he was operated on. And when the state takes over a failing bank, el banco fue intervenido. English « intervention » is a stepping in from outside, and none of the three would be called that.