LESSONS UNLEARNED:

Shot: “When South Vietnam fell…the North captured a treasure trove of American tanks, trucks and other equipment sitting in warehouses.”

—“Lessons of Vietnam — How to avoid a repeat, and why it’s crucial to do so,” Brendan Miniter, the Wall Street Journal, January 2, 2007

Chaser: “According to Reuters, the U.S.-made weaponry that fell into enemy hands including 2,300 Humvee armored vehicles, at least 40 M1A1 main battle tanks, 74,000 machine guns, and as many as 52 M198 howitzer mobile gun systems, plus small arms and ammunition.”

—“U.S. Shoots Itself In the Foot By Accidentally Arming ISIS,” the Fiscal Times, June 4th, 2015.

To be fair, “accidentally” is a perfectly cromulent substitute for the adverb “unexpectedly.”