PRAGUE  - The prime ministers of the Czech Republic and Slovakia both sounded an upbeat note Tuesday as they looked back on the peaceful split of the former Czechoslovakia into two states 20 years ago. "The step was correct, and it was the only option," Czech PM Petr Necas said during a televised meeting with his Slovak counterpart Robert Fico in the southern Czech city of Brno. "The two decades have confirmed this, we can see a very good development of both countries and their mutual ties," added the PM. The split was propelled by separatists in Slovakia who had long felt slighted by Prague - a situation that Fico, a leftist in office since April 2012, described as "unsustainable".