Citing evidence that suggests cellular phone calls placed from airplanes can interfere with wireless communications on the ground, FCC Chairman Kevin Martin has asked the FCC to end its inquiry into whether current prohibitions against the usage of mobile phones in flight should be lifted. Since launching its inquiry in 2004, the FCC has received more than 8,000 comments that, overwhelmingly, oppose a lifting of the ban. A majority of respondents to a 2005 USA Today poll (68%) also favor keeping in place the current ban against cell phone use on aircraft. Announcing the FCC’s decision to end the inquiry, Martin noted comments, filed by Verizon Wireless, Cingular Wireless and other mobile phone firms, that argue that cell phone calls in flight present “complex technical and engineering issues that have not been resolved.” Among the chief concerns of the wireless industry is the potential of in-flight wireless calls to jam multiple cell sites on the ground, as a single mobile phone used several miles in the air may be capable of contacting multiple ground-based towers simultaneously. Acknowledging that “the record was still unclear as to whether [in-flight cell phone calls] would create interference,” Martin told reporters: “it doesn’t make . . . much sense to go forward.”