A growing number of international companies are testing their defense technology in Ukraine. Danylo Dubchak/Frontliner/Getty Images Ukraine launched a program last year to host companies that want to test their defense technology. Hundreds of companies have expressed interest, and the number is rising, a defense executive said. Western firms are gaining access to the war. But the struggle is adapting rapidly to its demands. KYIV, Ukraine — A growing number of Western defense companies are lini