Explain amirs feelings when he learns the truth about Hassan being his half brother. How does this affect amirs view of Baba and Hassan.

After storming out of Rahim Khan's apartment, Amir had tea at a local café. He felt like a foreigner in his own life. Now that he knew Hassan was his half-brother, it seemed absurd that he had not realized it before. Baba had always treated Hassan like a son not just because he cared for him, but because Hassan was really his son. Amir wondered how Baba could have broken his own cardinal rule about not lying, how he could have lived with himself after shaming Ali.

Suddenly, Baba did not seem like such a shining example of righteousness. Amir now understood that Rahim Khan had called him to Peshawar to pay not only for his betrayal of Hassan, but for Baba's betrayal of Ali. Amir wondered if he was to blame for Hassan and Ali's deaths because he was the one who drove them out of the house and split up the family. Finally, at thirty-eight years old, Amir was ready to take responsibility for his actions. He returned to Rahim Khan's apartment to find him praying and told him he would bring Sohrab to Peshawar.