Question

publication of the photo saigon execution; shootings at kent state university; burning draft cards; leak of the pentagon papers; strengthened the student movement against the war; exposed events in the war that had not been reported by the media; increased anti - war sentiment in the united states during the tet offensive; led to changes in selective service

Explanation:

1. For "strengthened the student movement against the war" - The Kent State shootings (shootings at Kent State University) were a pivotal event that galvanized student opposition to the Vietnam War, so we match with "shootings at Kent State University".
2. For "exposed events in the war that had not been reported by the media" - The Pentagon Papers leak revealed previously undisclosed information about the Vietnam War, so we match with "leak of the Pentagon Papers".
3. For "increased anti - war sentiment in the United States during the Tet Offensive" - The publication of the photo "Saigon Execution" showed the brutality of the war during the Tet Offensive, increasing anti - war sentiment, so we match with "publication of the photo 'Saigon Execution'".
4. For "led to changes in Selective Service" - Burning draft cards was a form of protest against the draft, and this protest along with others led to changes in the Selective Service system, so we match with "burning draft cards".

Answer:

1. strengthened the student movement against the war - shootings at Kent State University
2. exposed events in the war that had not been reported by the media - leak of the Pentagon Papers
3. increased anti - war sentiment in the United States during the Tet Offensive - publication of the photo "Saigon Execution"
4. led to changes in Selective Service - burning draft cards