Question For The Day 28 Dec 06

What was this famous cheque used to buy ??

Hints

1. It changed the Geography of two nations.
2. The biggest land acquisition deal ever.
3. Think stars , think power think.................

Answer for the Day 28 Dec 06
Well the answer I was looking for is " Alaska "
USA bought Alaska ( State ) from Russia for an amount of US $7200,000 app.