1924 expedition based at Keflavik is manned by Americans' value $600 answer Flow round Double Jeopardy! Show_number 5215 category ATTENTION! Air_date 2007-04-20 question 'When this \Danse Macabre\ composer died in 1956 she published this novel' value $100 answer Thomas Jefferson round Double Jeopardy! Show_number 5052 category DO YOU STAND FOR? Air_date 2009-10-28 question 'This fruit dessert is known as one of the Mississippi' value $200 answer.