their foreign minister told diplomats at the u.n., "we didn't do it." that was his exact quote. ukraine this week blamed russia not for shooting down one of its fighter jets but shooting down one of its military cargo aircraft. there's not been a clear denial from russia on that one. u.s. officials tell nbc news they believe that ukrainian military transport plane was shot down from the russian side of the border by russian forces unequivocally. there is a long and terrible and, frankly, duplicitous history of militaries including even our own shooting down unarmed and unequivocally innocent passenger jets carrying dozens of even hundreds of civilian passengers. there's a lot of them. accountability for those incidents almost always starts with the guilty party denying responsibility. denying that it even could have been them. even the long-term resolution of these matters can be terrible and even strange. the soviet pilot who shot down that korean airlines jet in 1983, the one that killed all