Context: CREATE TABLE table_12791809_1 (freight_carried_s_tonne INTEGER, super_b_capacity_reached_ VARCHAR, _citation_needed_ VARCHAR)
Question: What is the least amount of freight carried when the super b capacity reached was February 26?
Answer: SELECT MIN(freight_carried_s_tonne) FROM table_12791809_1 WHERE super_b_capacity_reached_[_citation_needed_] = "February 26"