Nuclear experts are creating a global coalition to advise President Donald Trump and other world leaders on preventing nuclear war, Politico reported Thursday.

The Nuclear Crisis Group is expected to launch in Vienna on Friday. The coalition assembled in response to Trump and Russian President Vladimir Putin’s rhetoric, which the experts say is increasing the risk of a nuclear conflict.

One of the group’s leaders is Richard Burt, former U.S. ambassador to Germany and chief negotiator of the Strategic Arms Reduction Treaty. He said Thursday, “Not only is the U.S.-Russia relationship on much more shaky ground but the whole political environment has deteriorated.”

“The issue of nuclear weapons has strangely kind of receded from people’s consciousness,” Burt said. “We must remind people in these different crisis situations that there is a nuclear danger and it needs to be addressed.”