KYIV, April 3 (Reuters) - Former U.S. Secretary of State Mike Pompeo visited Ukraine on Monday to underscore his support for Kyiv and said he would work towards Washington supplying F-16 fighter jets and long-range missiles for the country's war against Russia. Asked whether he would back providing Ukraine with F-16 fighter jets and long-range missiles Pompeo said: "Yes. And the training and the software and all the things needed to actually protect and defend your own land." Addressing an audience of Ukrainian lawmakers, government officials, representatives of the military, civil society activists and students, he said providing military support...