LOCPT_151005_219
Existing comment: HERBLOCK, Washington Post

Attempting to halt the flow of supplies from China into Vietnam, the United States bombed in the far north near the border between the two countries. Because President Johnson had lifted restrictions on pilots flying near the Chinese border, Herblock used the precipice, plunging into an unseen chasm, as a metaphor -- suggesting that Johnson unwittingly headed into a direction that would engulf the United States in a bigger war.
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