The video shows Trump saying other countries should have nuclear weapons.
"There's no moral equivalence here," the former U.N. ambassador said.
Obama will make a historic visit to promote "a world without nuclear weapons."
He'll reportedly visit the nuclear bombing site after the G-7 summit in Japan.
"Iran deserves the benefits of the agreement that they struck," Kerry added.
Obama said the summit helps prevent terrorist groups from accessing nuclear materials.
Friday's launch is the latest in a long line of missile tests this year by Pyongyang.
Ernest Moniz called Trump's rhetoric on nuclear weapons "extremely troubling."
Trump said it may be better for South Korea to have nuclear weapons to defend itself.
"He is probably on the wacky side," Trump added of Kim Jong Un.
The U.N. Security Council promised "further significant measures" after the nuclear test.
The GOP contender said China should rein in its ally after Pyongyang conducted a nuclear test.
Palin tore into Obama's trip to Hiroshima in an opening speech for a Trump rally.
The country called Obama a "nuclear war lunatic."
North Korea's foreign minister proposed a deal with the U.S.
“Everyone should visit Hiroshima, and ‘everyone’ means everyone,” he said.
"'It's a big place' is not a good excuse for using nuclear weapons," he added.
President Obama on Friday blasted Republican presidential front-runner Donald Trump on an...
"Europe is a big place. I'm not going to take cards off the table," Trump said.
"Somebody hits us within ISIS, you wouldn't fight back with a nuke?"
"That’s a tough question," Dan Coats says.
"North Korea was able to obtain nuclear weapons because of ... the Clinton administration."
The 2016 presidential hopeful advocated imposing international sanctions on North Korea over the...
“We live in a world surrounded by people who want to kill us,” the former Speaker said.