The Pentagon has lifted restrictions to send a limited number of U.S. defense contractors to Ukraine for maintenance of American weapons systems such as F-16s and Patriots. This move responds to urgent needs for repairs in the face of combat, ensuring quicker returns of equipment to Ukrainian forces. The initiative comes amid concerns about future U.S. military aid as Trump prepares to take office. Currently, a majority of promised aid has yet to reach Ukraine, complicating its military operations against Russia. Safety plans will be required from contractors, who will operate away from frontlines.