CREATE TABLE table_70276 ("Start Date/Time" CLOB, "Duration" CLOB, "End Time" CLOB, "Spacecraft" CLOB, "Crew" CLOB)

What is the duration of the flight with end time of 21:06?
SELECT "Duration" FROM table_70276 WHERE "End Time" = '21:06'
SELECT "Duration" FROM "table_70276" WHERE "End Time" = '21:06'