US troops in Europe request bigger guns amid tensions with Russia over UkraineOne of the last American combat units stationed in Europe is asking the government for bigger guns amid rising tensions over Russia’s involvement in the Ukraine conflict. The 2nd Cavalry Regiment is requesting that 81 of its 8-wheel-drive Stryker infantry carrier vehicles be equipped with 30-mm. automatic cannons — double the caliber of the 12.7-mm. guns they already carry, the military news website Breaking Defense reports. The House Armed Services committee is already setting aside money for the upgrade, which the Army approved Wednesday, according to a memo obtained by the website. The upgraded cannons would give the Strykers added firepower against other light-armored vehicles. The 2nd Cavalry Regiment, based in Vilseck, Germany, had been deployed to the Baltic States to deter aggression following Russia’s seizure of Ukraine’s Crimea region, Breaking Defense reports. NATO’s chief on Thursday reported a sizeable Russian military buildup on the border with Ukraine that he said would enable pro-Moscow separatists to launch a new offensive with little warning.NATO Secretary-General Jens Stoltenberg said Russia has substantially stepped up supplies to the rebels, as well as providing them with advanced training and equipment like drones, despite a cease-fire. MORE