  VERITAS, the Very Energetic Radiation Telescope Imaging Array System, is an
array of four imaging Atmospheric Cherenkov telescopes in southern Arizona. It
is sensitive to gamma rays at energies above 100 GeV. Here, we discuss the
results of observations of two well known VHE blazars, Markarian 421 and
Markarian 501, during Spring 2006 which were made with the first two telescopes
during the comissioning phase of VERITAS. During most of this time Mrk 421 was
in an unusually active state while Mrk 501 was in a much lower flux state. As
such, these observations provided an opportunity to test the sensitivity of the
instrument to strong and weak sources. We discuss implications of these
observations on our understanding of these objects.
