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The first aircraft made in the US around 1900. -Many people were building and testing them, and no exact date is available.
The high point was probably reached in WWII when 6.5 million US women were employed in the defense industry.
Guam.
Boxer Rebellion/China 1900 & Philippine Insurrection 1900-1902
yes
There were five transcontinental railroads in the US in 1900.
According to the Kaiser Family foundation, as of September 2014 there were 893,851 active physicians in the United States
400
There were five transcontinental railroads in the US in 1900.
The US does not have "licensed abortionist". It does have licensed physicians who perform legal abortions.
Generally, allopathic (MD) and osteopathic (DO) medical colleges graduate 19,000 new physicians annually.
8.8 millon
about 8,800,000
1900 milliliters equals 385.48 US teaspoons or 320.979 Imperial teaspoons.
There are about 455,000 US physicians (which I presume is a dermatologist according to the webpage) and 52% are men and 48% are women.
It is difficult to provide an exact number, as definitions and classifications of serial killers can vary. However, estimates suggest that there have been hundreds of serial killers in the US since 1900.
The US was considered a world power in 1900. By 1900 America was settled. The Native Americans were no longer at war with the US. They were on reservations by this time. Oil had also been drilled in the US by 1900.