Serbs in Northern Kosovo say they'll take defensive action against any NATO attempts to clear their roadblocks near the border with Serbia. Tuesday is the deadline for them to go - otherwise, NATO peacekeepers have threatened to force them out. The barricades were built after Kosovo took control of two border crossings, assisted by NATO and the EU. Maria Finoshina reports from Kosovo-Serbian border.<br /><br />RT on Twitter http://twitter.com/RT_com <br />RT on Facebook http://www.facebook.com/RTnews
