If the aircraft was  ussr mig-25 rb how many were destroyed?
CREATE TABLE table_1817852_1 (destroyed VARCHAR, aircraft VARCHAR)
SELECT destroyed FROM table_1817852_1 WHERE aircraft = "USSR MiG-25 RB"
### Context: CREATE TABLE table_1817852_1 (destroyed VARCHAR, aircraft VARCHAR) ### Question: If the aircraft was  ussr mig-25 rb how many were destroyed? ### Answer: SELECT destroyed FROM table_1817852_1 WHERE aircraft = "USSR MiG-25 RB"