Utilize the input text as a context reference, choose the right relationship between 'Wolf Blitzer' and 'CNN' from the options.
Options: chief executive officer, founded by, headquarters location, employer

President Barack Obama called for greater regulation of drones, CNN anchor Wolf Blitzer brought up the specter of al Qaeda-manned drones, and the drone-maker itself installed a firmware update that prevents its drones from flying near the White House.
employer