The cities of Hiroshima and Nagasaki held ceremonies honoring the hundreds of thousands of civilians killed by American atomic bombings in the summer of 1945. One of President Harry Truman's grandsons, Clifton Truman Daniel, attended a ceremony in Hiroshima two days before the anniversary. He came as a private citizen, not a representative of the US government. No standing U.S. president has ever visited Hiroshima, though Jimmy Carter visited after his retirement from the White House. This year the only high-ranking U.S. official was the U.S. Ambassador to Tokyo. The U.S. is warning other states not to develop nuclear weapons, while U.S. allies continue to possess nuclear warheads.

don't sweat it

Helen: I don't know how I'm going to finish my exam and plan for my vacation at the same time. It's too stressful for me.

Daniel: Don't sweat it. Give me your planned dates for departure and return, and I'll handle the bookings. Just concentrate on your exam.

Explanation: When we want to tell someone not to worry about something, we can use phrases like don't sweat or don't sweat it.

cumulative effect

Patient: I read somewhere that taking this medicine for too long can cause damage to my kidneys.

Doctor Frasier: Yes, it's true. The drug can have a cumulative effect that could cause some damage. I want you to take this medicine for two weeks only.

Explanation: A cumulative effect means that a situation builds up slowly over a long time.

capital-intensive

Dear Mr. Palmer:

I don't think we can go ahead with the building of the new factory this year. It's a very capital-intensive project, and speaking frankly, we just don't have the money now. Let's talk again next year.

Explanation: a capital-intensive project is one that requires a great deal of money.