Her tweet, on the 44th anniversary of the couple’s marriage:

“Over 1,057,000 people have been killed by guns in the USA since John Lennon was shot and killed on 8 Dec 1980.”

In a series of follow-up tweets:

“31,537 people are killed by guns in the USA every year. We are turning this beautiful country into war zone.”

“Together, let’s bring back America, the green land of peace.”

“The death of a loved one is a hollowing experience. After 33 years our son Sean and I still miss him.”

The image of Lennon’s bloodied spectacles, with New York’s Central Park in the background, was also the cover photo of Ono’s 1981 album Season of Glass.