Ok, the title is a little misleading: it wasn't one lump sum, it was made up of a whole lot of smaller amounts.
The thing about the returning of the items: are the owners even alive? If they aren't, you know who gets the money don't you? The government.....and in this case, they really do need it to rebuild the country. But if it was here? I dunno.
A couple of points to ponder though:
1) Here, you'd never be able to deposit it, or buy a car with it, or make any large purchase that has any paperwork associated with it. RevCan would be on you like white on rice.
2) Since many of the owners might be dead, I'd make an attempt at locating the rightful owners myself and if they in fact turned up to be deceased, I'd keep it. (well, not the umbilical cord in a box lol..)
3) Gold bars: again, how would you dispose of it? Even pawn shops require ID.
I think, with the safe containing $1M in cash, and I couldn't locate the owner, I'd simply make out false invoices to "earn" the money over time and pay the tax on it......