We study N_f=2 lattice QCD with nonperturbatively improved Wilson fermions at
finite temperature on 16^3 \cdot 8 lattices. We determine the transition
temperature at m_{\pi}/m_{\rho} \sim 0.8 and lattice spacing as small as
0.12fm. The string breaking at T < T_c is also studied. We find that the static
potential can be fitted by a simple expression involving string model potential
at finite temperature.Comment: 6 pages, 6 figures, contribution to Lattice 2002(topology