The CTBT program, to which the US is a signatory country, reawakened research in infrasound after a hiatus of over 20 years. As part of the CTBT International Monitoring System (IMS) a network of 60 infrasound stations is planned so as to be able to detect atmospheric explosions with a threshold of approximately 1 kiloton. The Geophysical Institute infrasound group, under the leadership of Dr. Wilson and Dan Osborne, has been asked to install three of the US IMS stations: one in Fairbanks on the UAF campus and two in Antarctica. Our research interest in this program is in the world-wide net of stations that can detect and analyze natural infrasound sources such as bolides, volcanic eruptions and microbaroms, the narrow-band acoustic radiation from large marine storms. As it happens the frequency of microbarom radiation is very close to the frequency expected to characterize small explosions and so the analysis and understanding of microbaroms isessential to the problem of signal discrimination and detection. Why the chaotic winds in a large storm should produce a narrow-band acoustic signal is not clearly understood although some recent work has made progress on the subject. In this talk I will give an overview of the CTBT program, our participation, the instrumentation we use, some of the interesting natural and man-made signals we observe and our approach to signal analysis. I hope this will set the stage for future discussions of some of the details of the work we are doing.