Dee ihe na-esote paragraf a - Ụlọ ọrụ abụọ ahụ na-ewu ụlọ bụ ndị na-elekọta ụzọ ahụ na Mont Blanc. Mgbe ọkụ gbara n'afọ 1999
nke mmadụ 39 nwụrụ, nke gosipụtara etu enweghị nkwekọrịta nwere ike isi gbochie nchekwa nke ọwara ahụ, a na-ejikwa otu ụlọ ọrụ: MBT-EEIG, nke ma ATMB na SITMB na-achịkwa ọnụ, site na nkesa 50 <unk> 50 mbak.