Comment on "What does the Letelier-Gal'tsov metric describe?"
  We show that the Letelier-Gal'tsov (LG) metric describing multiple crossed strings in relative motion does solve the Einstein equations, in spite of the discontinuity uncovered recently by Krasnikov [gr-qc/0502090] provided the strings are straight and moving with constant velocities. 
G. Clement, D.V. Gal'tsov and P.S. Letelier