Progressive jackpot its break-even level) than a game that requires only a 5-credit wager to qualify. Usually the jackpot can only be won by winning the combination with the highest payoff, e.g. a royal flush at a video poker game, or five of the most valuable symbols (lemons, cherries, alligators, etc.) on a slot machine. In some games such as video poker, blackjack, or Caribbean stud poker, it is possible to compute an optimal playing strategy based on the average payoff (the amount of payoff times the chance of payoff). Because the jackpot of a progressive game constantly grows, it sometimes exceeds
Straight Flush Kanose (26 July), and Maizuru (29 July) in "Straight Flush", while 1st Lt. Charles D. Albury and crew C-15 used it to bomb Koromo (挙母市 Koromo-shi). On August 6, "Straight Flush" flew a mission over Japan as a weather patrol aircraft for the Hiroshima bombing; two days later, it made its final combat flight, a bombing raid on Yokkaichi. One source (Campbell) states that on the first Pumpkin mission, on July 20, Eatherly attempted to bomb the Imperial Palace through overcast as a "target of opportunity" but missed, hitting a bridge called Gofukubashi. The attack was contrary to bombing restrictions