Ukraine is forging ahead with embryonic plans for joint weapons production with some of its international allies, top officials said, while the U.S. announced it was halting some arms shipments promised to help Ukraine fight off Russia. A renewed Russian push to capture more Ukrainian land has put Ukraine’s short-handed defenses under severe strain, and Russian missiles and drones are battering Ukrainian cities. As Washington has distanced itself under U.S. President Donald Trump from Ukraine's war efforts, a bigger onus has fallen on European countries to pressure Russia.