Happening now a major shift by President Biden as he tells allies the United States

will support joint training for Ukrainian forces on F-16 fighter jets, this as we're getting updates from the war zone, including

reports of explosions in Russian occupied territory.

Also tonight, a serious setback for talks on raising the federal debt limit and

avoiding a catastrophic default.

With negotiations now at hold, I'll ask the former Treasury Secretary Larry Summers what the President and

the Congressional leadership should do next as time for reaching a deal is

running out. A new insight tonight into Senator Diane Feinstein's health and mindset after a new confirmation of medical

complications she faced.

I'll speak with her former Senate colleague Barbara Boxer amid growing questions about

Senator Feinstein's ability to serve.

Welcome to our viewers here in the United States and around the world.

I'm Wolf-Blitzer, you're in the situation room.

We begin this hour with two of the most pressing matters for President Biden as he meets with key allies in Japan,

the war in Ukraine and the threat of the United States defaulting on its debt.

See in its chief White House correspondent Phil Mattingley is with the president in the

G7 summit in Japan. Phil there are significant new developments on both of those

fronts today. Give us the latest.

Well that's right President Biden's advisors were very clear in the lead up to this trip

that they knew it was going to be a complex balancing act between what was going on back home in Washington

and what the president was trying to do here and Hiroshima and never has that been more clear,

laid bare over the course of the last 24 hours. The president in between

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