Americans are remembering students who died in recent weeks while trying to stop gunmen at two schools in the United States. Some people have praised the students for their actions, calling them heroic.Their actions demonstrate growing public support for guiding students on what they can do, in some situations, to stop armed attackers.Experts say educators should offer teachers and students as many choices as possible for how to deal with an active shooter - including fighting back.On April 30, a gunman opened fire at the University of North Carolina at Charlotte. The university sent students messages on their phones that read "Run, Hide, Fight."Riley Howell chose to fight. He lost his life trying to stop the shooter. The local police chief described the 21-year-old student as "the first and foremost hero."He said if Howell had not tackled the gunman, more students could have died. Along with Howell, one other student died in the attack.