Seventeen people have died after a gunman opened fire at a Florida high school on Wednesday. Authorities have charged Nikolas Cruz, a 19-year-old former student at the school, in the shooting at Marjory Douglas Stoneman High School in Parkland, near Fort Lauderdale. They have said he was armed with an AR-15 semiautomatic rifle. Here is what we know so far about the victims, including those who are dead, injured, and missing.