O’Brien has spent the past 30 years as a faculty member at UMSL and is noted for his work using intracavity laser absorption spectroscopy.

O’Brien has spent the past 30 years as a faculty member at UMSL and is noted for his work using intracavity laser absorption spectroscopy.
O’Brien has spent the past 30 years as a faculty member at UMSL and is noted for his work using intracavity laser absorption spectroscopy.
O’Brien has spent the past 30 years as a faculty member at UMSL and is noted for his work using intracavity laser absorption spectroscopy.
The annual overnight music camp features an immersive four days of singing led by some of the world’s best-known names in a cappella music.