Inve□tigators learned that t□e□g□oup□had bee□ □rie□ds f□□ years, but rece□tly the□e□had been □□nsion □mong them□ □umors□of □isagre□ments and□argumen□s □□ring th□ trip began to s□rf□ce, leading authoriti□□ to □peculate wheth□r □□ul pla□□was inv□□v□d□ Each member o□ t□e group had a different s□o□y to te□l, and the□i□consistenci□s in t□e□r ac□ou□ts □□ly □dded t□ □he m□stery□of the missi□□ □ine.历史的洪□汹涌□/h2>