(Editor’s note: paragraph 4 contains language that readers may find offensive.) The digital sign is pictured outside Columbine high school as some Denver area schools have closed while police search for an armed woman "infatuated" with Columbine, days ahead of the school shooting's 20th anniversary, in Littleton, Colorado, U.S., April 17, 2019. REUTERS/Rick Wilking/File PhotoBy…