d04f9e2c_r__The_Last_Airbender_resource__Aang_s_experience
[Chakra] Air Chakra [Deals with] Love [Blocked by] Grief [Location] Heart [Aang's experience] 
Laying his grief before him, Aang saw all of the Air Nomads who were eliminated by the Fire Nation during the Air Nomad Genocide in the early stages of the Hundred Year War, with Gyatso being the first among them. They faded away and became smoke. Love, according to Pathik, was a form of energy that swirled all around people. He stated that the Air Nomads' love for Aang still existed inside Aang's heart and was reborn anew, in the form of new love — Katara. With his tears, Aang also let his pain flow away.
Chakras - Avatar Wiki, the Avatar: The Last Airbender resource
Aang's experience