U.S. Secretary of State John Kerry concluded his visit to Hiroshima for the Group of Seven foreign ministers' meeting Monday by calling the displays of nuclear horror at the Hiroshima Peace Memorial Museum "gut-wrenching" and "stunning."

"It tugs at all of your sensibilities as a human being," Kerry said at a news conference following the conclusion of the ministerial meeting. "It also reminds everybody of the extraordinary complexities of the choices of war, and what war does to people and to communities, to countries, and to the world."

But Kerry deferred when asked if his visit — and experiences in the city — will now help persuade U.S. President Barack Obama to visit Hiroshima when he comes to Japan next month for the G-7 leaders' summit in the Ise-Shima area in Mie Prefecture.