Approximately 100 U.S. citizens have been cleared to join Ukrainian forces fighting against Russia, part of a wave of some 20,000 foreigners who have been approved after Ukrainian President Volodymyr Zelensky called for help. The Americans include veterans who fought in the wars in Iraq and Afghanistan, including helicopter pilots. They and other foreigners who have moved to help “really feel that this war is unfair, unprovoked,” Ukraine’s military attaché, Maj. Gen. Borys Kremenetskyi, said in Washington after meeting with U.S. defense officials. “They feel that they have to go and help.” Despite top U.S. officials, including Secretary of State Antony Blinken, discouraging Americans from going to fight in Ukraine, the embassy in Washington has heard from at least 6,000 people inquiring about volunteering for service since Russia invaded Ukraine. The vast majority of that group are American citizens, according to Kremenetskyi, who oversees the screening of potential U.S. recruits. Half the potential …