  The Fermilab Lattice and MILC collaborations are completing a comprehensive
program of heavy-light physics on MILC (2+1)-flavor asqtad ensembles with
lattice spacings as small as 0.045 fm and light-to-strange-quark mass ratios as
low as 1/20. We use the Fermilab interpretation of the clover action for heavy
valence quarks and the asqtad action for the light valence quarks. The central
goal of the program is to provide ever more exacting tests of the unitarity of
the CKM matrix. We present preliminary results for one part of the program,
namely the analysis of the semileptonic decay B -> D l nu at nonzero recoil.
