Reminds me of the Japanese using balloons in WWII to send bombs with the windstreams to the US. Out of thousands released they succeeded in starting a few fires in Alaska.
Actually, they also hit the mainland of the United States;
16 other states besides Alaska, along with Mexico & Canada,
having one or more balloons land on their soil.
en.wikipedia.org/wiki/Fire_balloonwww.wired.com/2010/05/0505japanese-balloon-kills-oregon/From late 1944 until early 1945, the Japanese launched over 9300 fire balloons,
of which 300 were found or observed in the U.S. Despite the high hopes of their designers,
the balloons were ineffective as weapons: causing only six deaths (from one single incident) and a small amount of damage.
The Japanese designed two types of balloons. The first was called the "Type B Balloon" and was designed by the Japanese Navy.
It was 9 m (30 ft) in diameter and consisted of rubberized silk. The type B balloons were sent first and mainly used for meteorological purposes.
The Japanese used them to determine the possibility of the bomb-carrying balloons reaching North America. The second type was the bomb-carrying balloon.
Japanese bomb-carrying balloons were 10 m (33 ft) in diameter and, when fully inflated, held about 540 m3 (19,000 cu ft) of hydrogen.
Their launch sites were located on the east coast of the main Japanese island of Honshū.
Japan released the first of these bomb-bearing balloons on November 3, 1944.
They were found in Alaska, Washington, Oregon, California, Arizona, Idaho, Montana,
Utah, Wyoming, Colorado, Texas, Kansas, Nebraska, South Dakota, North Dakota, Michigan and Iowa.
Hayfork, California about 40 miles (64 km) west of Redding. On February 1, 1945 a Japanese bombing balloon
was spotted by several local residents drifting over the Trinity National Forest area and slowly descending.
No one knew what it was, but an alert forest ranger called the military authorities at the Presidio of San Francisco and reported it.
Meanwhile the balloon came to rest atop a 60-foot (18-meter) dead fir tree in the forest near a local road.
In the next few hours several people gathered in the area to gaze up at the strange object.
Shortly after dark there was a tremendous blast. The balloon's gas bag disappeared in
a fireball and the balloon's undercarriage came crashing to the ground.
No one was hurt. Forest rangers kept the curious well back from the fallen debris until
Army personnel arrived. Upon examination, it was found to be a Japanese bombing balloon
with four incendiary bombs and one high explosive bomb still aboard and the bomb releasing mechanism still very much intact.
The bombs most commonly carried by the balloons were:
Type 92 15-kilogram (33 lb) high-explosive bomb consisting of 9.5 pounds (4.3 kg) picric acid or TNT
surrounded by 26 steel rings within a steel casing 4 inches (10 cm) in diameter and 14.5 inches (37 cm)
long and welded to a 11-inch (28 cm) tail fin assembly.
Type 97 12-kilogram (26 lb) thermite incendiary bomb using the Type 92 bomb casing and fin assembly
containing 11 ounces (310 g) of gunpowder and three 1.5-kilogram (3.3 lb) magnesium containers of thermite.
5-kilogram (11 lb) thermite incendiary bomb consisting of a 3.75-inch (9.5 cm) steel tube 15.75 inches (40.0 cm)
long containing thermite with an ignition charge of magnesium, potassium nitrate and barium peroxide.
In all, (7) fire balloons were turned in to the Army in Nevada, Colorado, Texas, Northern Mexico, Michigan,
and even the outskirts of Detroit. Fighters scrambled to intercept the balloons, but they had little success;
the balloons flew very high (30,00+feet) and surprisingly fast (carried by the jet stream), and fighters destroyed fewer than 20.