Ukrainian troops fire an M142 HIMARS toward Bakhmut in May. Serhii Mykhalchuk/Global Images Ukraine via Getty Images Ukraine's use of HIMARS against Russia has earned the US-made rocket-artillery system high praise. Other European countries are pursuing their own rocket artillery, buying HIMARS or building new systems. Impressed with the success of the US-made M142 HIMARS multiple rocket launcher in Ukraine, more European nations want to buy HIMARS — or develop their own version of it. German defense contractor Rheinmetall and US defense firm Lockheed Martin have partnered to offer GMARS, a replacement for Germany's aging MARS 2 multiple launch rocket...