<p>The British Army has painted some of its Challenger 2 tanks in a new camouflage scheme that planners hope will help the 62-ton machines hide on city streets. But the government has withheld other, more important enhancements.</p>
<p>The tanks’ blocky, white, gray and brown scheme is actually a throwback to the Cold War, when British tankers prepared to defend West Berlin from the Soviets.</p>