We were trained to left-hand carry, since there was never a shortage of junior officers who took personal offense at any fumbling before a right-hand salute.

Looks like two women on the right side in the foreground hired a woman to hold an umbrella over them. I didn't know that was a thing!

Boater straw hats, that is. It seems they were quite popular. Then, there's all the sailors with their "Dixie cups", the long time nickname of the white hat. Looks like quite the shindig here. I enjoy seeing the many hats popular over the years, thanks to all the fine, enlargeable photos on Shorpy.

While it's impossible to identity those in the photo, we know that the President, Woodrow Wilson, was not one of them. On July 4, 1919 he was crossing the Atlantic on his return from the Versailles Peace Conference. From the U.S.S. George Washington on that date, he delivered the first presidential address broadcast by wireless transmission. While the technology allowed it to be heard by those on ships within 300 miles of Wilson's, the transmitter was installed on the wrong podium so his speech could barely be heard. He arrived in New York Harbor on July 8, and two days later delivered the Treaty of Versailles to the Senate for consideration.

Just look at that flying machine to the right of the monument.

If you tried to fly a small plane around the Washington Monument this afternoon, there would be fighter jets sent to shoot you down.