  In this paper, for compressible Euler equations in multiple space dimensions,
we prove the break-down of classical solutions with a large class of initial
data by tracking the propagation of radially symmetric expanding wave including
compression. The singularity formation is corresponding to the finite time
shock formation. We also provide some new global sup-norm estimates on velocity
and density functions for classical solutions. The results in this paper have
no restriction on the size of solutions, hence are large data results.
