Biden makes major shift

<p>First: The president tells allies the US will support joint training for Ukrainian forces on F-16 fighter jets.</p> <p>Plus: A serious setback for talks on raising the federal debt limit and avoiding a catastrophic default.</p> <p>And: New insight tonight into Senator Dianne Feinstein's health and mindset after new confirmation of medical complications she faced. </p><p>To learn more about how CNN protects listener privacy, visit cnn.com/privacy</p>