Airline execs Scott Kirby, Robert Isom, Ed Bastian, Joanna Geraghty and Robert Jordan attended ... More unveiling of a new ATC system in May. (Photo by Win McNamee)Getty ImagesToplineAmerican Airlines CEO Robert Isom on Thursday countered recent negative comments by United’s CEO, saying, “We don’t run our airline based on other airlines’ perception of our business”Speaking on American’s second quarter earnings call, Isom also noted that the carrier is growing at Chicago O’Hare. While United regularly touts ...