  In this proceeding we expose a particular case of a recent result obtained by
the authors regarding the incompressible Navier-Stokes equations in a smooth
bounded and simply connected bounded domain, either in 2D or in 3D, with a
Navier slip-with-friction boundary condition except on a part of the boundary.
This under-determination encodes that one has control over the remaining part
of the boundary. We prove that for any initial data, for any positive time,
there exists a weak Leray solution which vanishes at this given time.
