American Airlines flight attendants picket at O’Hare International Airport in May. (Photo by Scott ... [+] Olson)Getty ImagesAmerican Airlines CEO Robert Isom sought to break through negotiations with flight attendants on Wednesday, offering an immediate 17% raise.“We’ve offered increased pay for all flight attendants and are not asking your union for anything in return,” Isom said. “This is unusual, but these are unusual times.” He said the raise would appear in June paychecks.The offer was made in a video ...