Question: Which vehicle failed at launch?
SQL: SELECT "Vehicle" FROM "2-17113304-1" WHERE "Ceased operation" = 'failed at launch';

Question: What are the notes regarding the Scout X-4 vehicle which ceased operation in June 1971?
SQL: SELECT "Notes" FROM "2-17113304-1" WHERE "Vehicle" = 'Scout X-4' AND "Ceased operation" = 'June 1971';

Question: What was the ceased operation with a launch date of August 8, 1968?
SQL: SELECT "Ceased operation" FROM "2-17113304-1" WHERE "Launched" = 'August 8, 1968';

Question: What was the ceased operation that launched June 29, 1961?
SQL: SELECT "Ceased operation" FROM "2-17113304-1" WHERE "Launched" = 'June 29, 1961';