Table: satellite_info_2
Columns: name
launched
vehicle
ceased_operation
notes

Question: Which vehicle failed at launch?
SQL: SELECT "vehicle" FROM satellite_info_2 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 satellite_info_2 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 satellite_info_2 WHERE "launched" = 'august 8, 1968'

Question: What was the ceased operation that launched June 29, 1961?
SQL: SELECT "ceased_operation" FROM satellite_info_2 WHERE "launched" = 'june 29, 1961'