The Plot Thickens

The U.S. for the first time is selling Israel KC-135 tankers to refuel its jets. Since it takes about 3 minutes to fly across Israel I am going to hazard a wild guess that these aren't to support domestic air defenses. I wonder what it could mean? Are you listening Iran?

www.timesofisrael.com/reversing-policy-us-will-sell-israel-aerial-refueling-planes/