Washington (CNN)Retired U.S. Army Gen. David Petraeus, who has long resisted calls to run for political office, is teaming up with retired NASA astronaut Mark Kelly to create a new group urging greater gun control. The two announced on Friday that they were launching Veterans Coalition for Common Sense to encourage elected leaders to "do more to prevent gun tragedies." The group will feature veterans from every branch of the military who are urging lawmakers to toughen gun laws, the organization said in a news release.