Callahan


 * Characters:
 * Harold Callahan, a Pentagon internal security officer and member of the United States Army, mentioned in the Fallout 3 add-on Broken Steel.
 * Mrs. Callahan, a resident of Vault 111 in Fallout 4.
 * Mr. Callahan, a resident of Vault 111 in Fallout 4.
 * Angela Callahan, a librarian who resided in Vault 51, mentioned in the Fallout 76 add-on Nuclear Winter.


 * Weapon:
 * Callahan's Magnum, a unique weapon in the Fallout 3 add-on Broken Steel.