3 PM ET: Biden doubles down, Russian missile strikes, TSA travel record & more

President Joe Biden is defending his reelection bid to members of his party and hits back at some lawmakers who want him to step aside. Ukrainian President Volodymyr Zelensky is vowing to retaliate following a deadly barrage of Russian missile strikes across the country, including a children’s hospital in Kyiv. Israel's non-negotiables in ceasefire talks with Hamas may be creating new challenges. Chicago is reeling from a violent 4th of July weekend. And, the Transportation Security Administration hit a new all-time travel record.

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