NICOSIA, Cyprus (AP) — Turkey appeared to toughen its stance in talks to reunify Cyprus by insisting Tuesday that it won't sign up to any deal involving the withdrawal of all its troops from the ethnically divided Mediterranean island nation. At talks to end Cyprus' 43-year ethnic divide at the Swiss ski resort of Crans-Montana, Turkish Foreign Minister Mevlut Cavusoglu, made it clear that a peace accord would not include a specific, agreed-upon date by which all Turkish troops would have to be pulled out. The Greek Cypriots have proposed an international police force, backed by the U.N. Security Council, to keep the peace once the island is reunified.