 Complete the following phrase:  Foggia became the major base of the 15th Air Force. Its 2,000 heavy bombers hit Germany from the south while the 4,000 heavies of the 8th Air Force used bases in Britain, along with 1,300 RAF heavies. While bad weather in the north often cancelled raids, sunny Italian skies allowed for more action. After that the Luftwaffe had only one success in Italy, a 