The hemoglobin is checked before each donation to. ensure that the donor has adequate red blood cell levels to donate blood. Blood donors must have a minimum of 12.5 g/dL hemoglobin or a hematocrit of 38% to be accepted for donation. The hematocrit is a measure of the volume that red blood cells take up in the blood. Most men have a hemoglobin of 12.5 g/dL or greater and a hematocrit above 38 percent, but many women naturally have lower hemoglobin/hematocrit levels.
Iwo Jima, which means Sulfur Island, was strategically important as an air base for fighter escorts supporting long-range bombing missions against mainland Japan.ecause of the distance between mainland Japan and U.S. bases in the Mariana Islands, the capture of Iwo Jima was necessary to provide an emergency landing strip for crippled B-29s returning from bombing runs.
U.S. flag raised on Iwo Jima. During the bloody Battle for Iwo Jima, U.S. Marines from the 3rd Platoon, E Company, 2nd Battalion, 28th Regiment of the 5th Division take the crest of Mount Suribachi, the islandâs highest peak and most strategic position, and raise the U.S. flag.Marine photographer Louis Lowery was with them and...n this day, during the battle for Iwo Jima, U.S. Marines raise the American flag atop Mt. Suribachi, the highest point on the island of Iwo Jima and a key strategic point. Later, Marine commanders decide to raise a second, larger flag, an event which an Associated Press photographer captured on film.