SOME CURRENT PROBLEMS IN HIGH-ENERGY COSMIC-RAY PHYSICS

Nowadays interest of Cosmic Ray Community moves to the upper end of co smic ray energy spectrum. It is very important and interesting area of investigations, especially in the region of Zatcepin-Kuzmin-Greizen c utoff and above. But there are some irregularities at energy region 10 (16)divided by 10(19) eV and possibly we can't understand the situatio n here if we would not understand the situation in the 10(14)divided b y 10(16) eV region. In fact, there are several ambiguities in cosmic r ay physics in this energy region. Between them the most important is t he problem of sharp bend in Primary Cosmic Ray Energy Spectrum (PCRES) at E similar to 2x10(15) eV and the reality of its existence. Possibl y this phenomenon is some kind of phantom appearing because of misunde rstanding of real processes in high energy interactions. At least some of experimental facts justify this point. Below we will discuss this and some other actual problems.