What 1979 event spurred jimmy carter to pursue a military buildup despite his preference for protecting national security through nonmilitary means?

Answer – The Soviet invasion of Afghanistan

The decision of the Soviet Union's to invade Afghanistan in 1979 impelled a change in President Jimmy Carter's approach. He pursued called for significant increases in defense spending despite his preference for protecting national security through non-military means. Carter insisted that the Soviet Union's actions jeopardized the Middle East.

the fourth amendment protects:

"the right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no warrants shall issue, but upon probable cause, supported by oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized."  

so this would mean the denial to search and seizure without warrant or permission.