U.S. Ambassador to Japan Caroline Kennedy, wearing a helmet, protective suit and mask, inspects the central control room for the Unit One and Unit Two reactors of the tsunami-crippled Fukushima Dai-ichi nuclear power plant Wednesday. Pic: AP.

TOKYO (AP) — U.S. Ambassador Caroline Kennedy has gotten a firsthand look inside the Japanese nuclear plant devastated by the 2011 earthquake and tsunami.

Kennedy toured the Fukushima Dai-ichi plant for about three hours Wednesday.

She wore a yellow helmet and a white protective suit with her last name emblazoned on it as she was shown around the plant.

The plant was damaged beyond repair by the March 11, 2011, disaster. Decommissioning the reactors is expected to take decades.

After touring the plant, Kennedy told reporters that it’s hard to visualize and understand the complexity of the challenge just from reading about it. She expressed gratitude to those who continue to work at the plant.