Monthly report for May 2002 by Christian A. Hummel: Hummel reduced 16 nights of NPOI data obtained during May, including data on the H-alpha project in which he assisted with the data analysis. On the Eta Vir project, he showed that we detect the motion of the close pair in this triple system. Hummel prepared the web pages which accompany the NPOI lab exercises on imaging at this year's Michelson Summer School on Interferometry in June at the CfA.