M-18 Smoke Hand Grenade
This grenade is effective as a ground-to-ground or ground-to-air signaling device, target or landing zone marking device, or for screening unit movements by putting out clouds of dense smoke. The grenade can be filled with any one of four smoke colors: green, yellow, red and violet. Each grenade will emit smoke for 50 to 90 seconds. They can be thrown 30 meters by an average Soldier.
https://www.pica.army.mil/pmccs/combatmunitions/grenades/Smoke/M18SmokeHand.html
18 U.S. Code § 2381 - Treason
U.S. Code
Notes
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Whoever, owing allegiance to the United States, levies war against them or adheres to their enemies, giving them aid and comfort within the United States or elsewhere, is guilty of treason and shall suffer death, or shall be imprisoned not less than five years and fined under this title but not less than $10,000; and shall be incapable of holding any office under the United States.
(June 25, 1948, ch. 645, 62 Stat. 807; Pub. L. 103–322, title XXXIII, § 330016(2)(J), Sept. 13, 1994, 108 Stat. 2148.)