1. On August 11, 1993, a record high temperature of 91°F (32.8°C) was recorded in Anchorage, Alaska's largest city. This was a surprising and memorable event, as temperatures over 90°F are rare in Anchorage, which typically has mild summers.

2. On August 11, 1907, the Alaska-Yukon-Pacific Exposition opened in Seattle, Washington. The exhibition showcased Alaska and the Yukon Territory's natural resources and promoted trade and tourism. The event was a significant cultural moment for Alaskans and marked the beginning of closer ties between Alaska and the Lower 48.

3. August 11, 1971, saw the groundbreaking ceremony for the Trans-Alaska Pipeline System. The project, which stretched 800 miles from Prudhoe Bay on Alaska's North Slope to Valdez on the southern coast, was a feat of engineering and helped usher in a new era of resource development in Alaska.

4. On August 11, 1942, the first U.S. military aircraft landed on Adak Island in the Aleutian Islands. The Aleutian Campaign, which lasted from June 1942 to August 1943, was a pivotal moment in World War II, as Japanese forces attempted to establish a foothold on American soil.

5. August 11, 1867, marked the day when U.S. Army Captain Charles Braden hoisted the American flag over Sitka, Alaska's former capital city, following the United States' purchase of Alaska from Russia. The ceremony marked the formal transfer of Alaska to the United States and set the stage for the territory's eventual statehood in 1959.