Apparently you all don't have the problems US medics have with misplaced ET tubes. We have capnography available for other purposes, but Pennsylvania recently stated that all advanced life support ambulances must carry capnography for the express purpose of never, ever having a misplaced ETT again. Although clinical skills are important, I do really enjoy getting a good capnography before-and-after on an asthma patient, watching the waveforms change from shark-fin to normal.