In this artwork, how is the Design and delays discussed?
On November 10, 1976, Calder brought the Mountains and Clouds maquette—his 20-inch (510 mm) sheet-metal model—to Washington, D.C., to present it to the Architect of the Capitol and finalize the placement of the piece. After making minor adjustments to two of the clouds, he expressed satisfaction with the maquette as positioned in a model of the atrium. This proved to be a final visit: Calder died of a heart attack that night after he returned to New York City. Despite his death, the approval of the maquette and the siting of the work meant that fabrication of the full-sized sculpture could proceed. But in 1979, fabrication was delayed and nearly terminated when public funds for the sculpture were eliminated from the costly construction budget for the Hart Building.
Financial assistance materialized in 1982 through Senator Nicholas F. Brady, who believed the Calder sculpture to be "the right work for the right place at the right time." As New Jersey’s senator for eight months—appointed to a vacancy pending election of a successor—Brady wished to present a gift to the Senate on his departure and offered to raise the needed funds. Together with art collector and philanthropist Paul Mellon and former Treasury Secretary C. Douglas Dillon, Brady formed the Capitol Art Foundation, which accomplished the task. The Calder sculpture was installed in the atrium of the Hart Building in 1986.
In 2014, the Clouds were lowered for a safety analysis and never put back.  On its website, the Architect of the Capitol explains: “Since the structural safety analysis identified the clouds as unsafe for reinstallation due to significant structural defects, the Architect of the Capitol, in consultation with the Calder Foundation, has determined that the best course of action is to refabricate the clouds to the artist’s original intent.”
New Jersey New York City Paul Mellon Architect of the Capitol atrium maquette Nicholas F. Brady heart attack C. Douglas Dillon