The 1.1"/75 caliber gun was an American anti-aircraft weapon of World War II. The name means that it had a bore diameter of 1.1 inches (28 mm) and barrel length of 75 × 1.1 inches = 82.5 inches (2.1 m), using the "caliber" nomenclature common to large artillery pieces.

It was developed when the U.S. Navy Bureau of Ordnance (BuOrd) decided that the .50 caliber machine gun was not adequate for future AA duties:

During the early part of World War II, they were deployed on most U.S. Navy warships of destroyer and larger size.

Due to teething problems that were never rectified, the gun was very unpopular with its crews. It was replaced with the Bofors 40 mm gun whenever possible, but served until the end of the war on some ships.

The guns were sometimes referred to as "Chicago Pianos."

Miley Ray Cyrus (born Destiny Hope Cyrus; November 23, 1992) is an American actress and pop singer-songwriter. She achieved wide fame for her role as Miley Stewart/Hannah Montana on the Disney Channel sitcom Hannah Montana.

Cyrus recorded music for the soundtracks, Hannah Montana (2006) and Hannah Montana 2/Meet Miley Cyrus (2007), released by Walt Disney Records. With the success of the Hannah Montana franchise she established herself as a teen idol. In 2007, Cyrus signed to Hollywood Records to pursue a solo career. She embarked upon the Best of Both Worlds Tour the same year, in which she performed as both herself and in character as Hannah Montana. The tour was eventually turned into a high-grossing concert film titled Hannah Montana & Miley Cyrus: Best of Both Worlds Concert (2008). In July 2008, Cyrus released her first solo album, Breakout (2008), which was commercially successful.

She began her foray into film by providing the voice of "Penny" in the animated film Bolt (2008). Cyrus earned a nomination for the Golden Globe Award for Best Original Song for her performance of Bolt's theme song, "I Thought I Lost You". She also reprised her role as Miley Stewart/Hannah Montana in Hannah Montana: The Movie (2009). The Hannah Montana: The Movie' soundtrack introduced her to new audiences within country and adult contemporary markets.