Ukrainians have watched the U.S. exit from Afghanistan with dismay and are desperate to hear reassurance of support as President Volodymyr Zelenskyy visits Washington, two former U.S. diplomats write.

"Especially during a pandemic, it is insanity for Russian-led forces and Ukrainians to be killing each other," write former U.S. envoys to Ukraine William B. Taylor, Steven Pifer and John E. Herbst.