Locating and characterizing the sources responsible for
cosmic reionization and ending the so-called "Dark Ages"
is a new frontier in theoretical and observational astronomy.
A popular view is that, a few hundred million years after
the Big Bang, a high density of low mass star forming galaxies
were produced. Finding and studying such faint sources is
a major driver for future facilities such as the James
Webb Space Telescope and the Thirty Meter Telescope.
Meanwhile, by harnessing the strong gravitational lensing
power of massive clusters, the first candidate sources beyond
z=7 are being found and studied. I will describe the progress
(and limitations) of the work we are doing with Keck, Spitzer
and Hubble in this area which provides a first tentative glimpse
of the Universe at redshift 10.