America built the first rocket to reach an altitude of 50 miles (80 km).
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Karl Wallenda of The Flying Wallendas died after falling off a tightrope between two hotels in San Juan, Puerto Rico.
The St. Petersburg-Tampa Airboat Line became the world's first scheduled flight.
New York became the first US court to allow blood test results to be used as evidence.
Arthur Schawlow & Charles Townes was granted the first patent for a laser.
The Spanish National Assembly officially abolished slavery in Puerto Rico.
