    Sentence. 1:. These. trainers, were  later, heard .boasting that, thein  assistance, led, to... the. October.  1993 shootdown.of .twoU.S.    Sentence .2:. At. a. later . point,  these. trainers. were. heard,  mentioning. that, they. had, nothing  to, do. with, the shoot-down of, two.  U.S. helicopters.