Ultra high energy events in ECHOS series and primary energy spectrum

The compilation of ultrahigh energy jets suggests at present the existence of a bump in primary energy spectrum (with the standard concept of high energy collisions). The pseudo-rapidity distribution exhibits some typical anomalies, more than the (P sub t) behavior, which are (may be) the fingerprints of quark-gluon plasma transition. The next results of Emulsion Chamber on Supersonic (ECHOS) will be in both cases determine to confirm those tendeancies, as well as an important effort of the cosmic ray community to develop in that sense a flying emulsion chamber experiment