Trivia

Sorry Rerun. Wrong guess. The answer to the first part is in the following:
From late 1944 until early 1945, the Japanese launched over 9,300 of these 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.
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[2] and Iowa, as well as Mexico and Canada.
General Kusaba's men launched over 9,000 balloons throughout the course of the project. The Japanese expected 10% (around 900) of them to reach America, which is also what is currently believed by researchers.[citation needed] About 300 balloon bombs were found or observed in America. It is likely that more balloon bombs landed in unpopulated areas of North America.
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Following the attack on Pearl Harbor, Hawaii, seven Japanese submarines patrolled the American West Coast. They sank several merchant vessels and skirmished twice with U.S. Navy air or sea forces. By the end of December, the submarines had returned to friendly waters to resupply. Many went to Kwajalein and then returned to American waters. Imperial Japanese Navy submarine I-17 was one of these vessels. She displaced 3,654 long tons (3,713 t) when submerged and was 365 ft 6 in (111.40 m) long. Her armament included six 20 in (510 mm) torpedo tubes and 17 torpedos in total. Up top was a 14-cm deck gun. I-17 carried 101 officers and crew under Commander Kozo Nishino.
About 1900 hours (7:00 pm) on 23 February 1942, I-17 came to a stop off of the Ellwood field. Nishino gave the order to prepare for action. A gun crew quickly took aim at a huge Richfield aviation fuel tank just beyond the beach. Nishino ordered his men to fire at 1915 hours (7:15 pm ), their first rounds landing close to one of the storage facilities. Most of the oilers had gone home for the night, but the few remained on duty heard the first rounds impact. They suspected an internal explosion, but a worker spotted I-17 in the dark. An oiler named G. Brown later described the attacker as so big he thought it was a cruiser or destroyer, until he realized only one gun was firing.
Nishino changed targets to the second storage tank. Brown and the others immediately called the police, but by this time Nishino's men had fired several more rounds.
Wild shells landed on a nearby ranch. One round passed over Wheeler's Inn, and owner Laurence Wheeler called the Santa Barbara Sheriff's department. The deputy told Wheeler that warplanes would arrive shortly, but no planes came. A shell did strike the Ellwood Pier, damaging it slightly. A derrick and pump house were destroyed, while a catwalk was damaged. After 20 minutes, Nishino ordered his men to cease fire.
Reverend Arthur Basham observed the submarine from Montecito. He reported that the attacker turned south towards Los Angeles, apparently flashing signal lights to the shore. I-17 continued its voyage, returning to Japan in safety. At least 12 and possibly as many as 25 5.5 in (140 mm) rounds were fired at the Elwood oil installation.
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You still have to answer part two.