The Last Straw

 is a secret achievement/trophy in Deus Ex: Human Revolution.

This is part of the story mission for locating Dr. Sandoval in Detroit during the Anti-Augmentation Riots and then talking him out of killing himself with the revolver.

Walkthrough
Start with the Tough Love response as your first answer, then follow-through with the rest of the conversation.

Use the following as a guideline for your follow-up answers: If you have the CASIE augmentation you can use "Omega" pheromones on him.
 * The target is suicidal, so a similar approach to hostage negotiation should be followed.
 * Sandoval believes he is doing the right thing.
 * Sandoval is traumatized by his experiences as an augmentation "fixer".
 * He feels betrayed by Taggart, whom he has served loyally since his conversion to the Humanity Front.
 * Sandoval generally tries to solve problems by avoiding them.
 * Try talking him down by persuading him to continue living to champion the good cause. Dragging in his family should be a last resort (but works, depending on his mood).