According to John Yoo's letter what duty does the government have that allows it to conduct warrant less searches and seizures related o terrorism?

According to John Yoo's letter, the government has a duty to protect national security, which justifies conducting warrantless searches and seizures in the context of terrorism. Yoo argues that the need to prevent imminent threats and safeguard the nation from terrorist attacks can supersede traditional Fourth Amendment protections. He contends that the executive branch has inherent powers to act decisively in matters of national defense. This interpretation allows for greater flexibility in surveillance and intelligence-gathering efforts to address potential threats.