The Defense Department's policy chief said the Biden administration is hesitant to send F-16 aircraft to Ukraine for several reasons, including timing and cost, despite new calls from Congress and requests from Kyiv to do so. Under Secretary of Defense for Policy Colin Kahl told the House Armed Services Committee today that even “under the most expeditious timeline,” it would take three to six years to provide Ukraine with new F-16s and around 18 months to provide used versions of...