Tonight, Joe Biden on the world stage in his first foreign trip as president as he tries to repair relationships with old allies, sending a message to Russia and China.

President Biden arrives in the UK for his first overseas trip with plans to give half a billion doses of COVID vaccines to the world and previewing a week of

war-win diplomacy. We're going to make you clear that the United States is back.

Falling short, new signs the U.S. may miss the president's July 4th goal of partially vaccinating

70% of adults, but how one major city is close to herd immunity, plus the race to

save the hundreds of thousands of doses about to expire. Exploiting the border crisis. An unprecedented

surge in opioids flooding in from Mexico, fueling the skyrocketing number of overdose deaths nationwide.

An uptick of ticks. The new warnings about Lyme disease. Bloods sucking insects spreading all over the country in unexpected places,

including the beaches of California. Privacy concerns, a new feature from Amazon.

Could millions be sharing their internet connection without knowing it?

Severe weather alert, more flash flooding in the south, more heat and humidity in the north,

is relief finally on the way.

And a graduation day surprise, one student's selfless gesture that could change a

classmate's life forever.

This is the CBS evening news with Nora O'Don. Reporting from the nation's capital.

Good evening and thank you for joining us.

We're going to begin tonight with President Biden's first trip overseas,

a mission the White House says, to repair relationships with allies and deliver a warning to adversaries.

And then a bit of vaccine diplomacy.

Sources tell CBS news that Mr. Biden will announce tomorrow that the U.S. is donating 500 million doses of Pfizer shot to 92 countries, a goodwill gesture designed to blunt criticism that his administration isn't doing enough to end the pandemic globally.

So for a man who has spent his political career focused on international relations,

Mr. Biden's presidency has centered on one issue, beating the virus here at home. This week's

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