(rpt, correcting header) New York, Mar 4 (Reporter) Washington's involvement in Kiev's economy is a much better guarantee of security than having troops from a third country in Ukraine, US Vice President J.D. Vance said. "The very best security guarantee is to give Americans economic upside in the future of Ukraine. That is a way better security guarantee than 20,000 troops from some random country that hasn't fought a war in 30 or 40 years. The security guarantee, and also the economic guarantee for Ukraine is to rebuild the country and ensure that America has a long term interest," Vance said in an interview with Fox News...////...