$40,047,425,768,420 in U.S. Debt, and an Experimental Vaccine for Skin Cancer

Plus, could tweaking flight paths reduce global warming? 

Here’s what we’re covering:

U.S. Debt Hits $40 Trillion as America’s Borrowing Binge Continues, by Alan Rappeport

Israel Opens Criminal Inquiries Into Killings of Hind Rajab, 5, and of Medics, by Isabel Kershner

A New mRNA Vaccine Could Prevent Skin Cancer From Returning, by Carolyn Y. Johnson

U.K. to Test Whether Tweaks to Trans-Atlantic Flight Paths Affect Global Warming, by Leo Sands

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