GARBA MUHAMMAD A video of some of the students kidnapped from a college in northwest Nigeria emerged on Saturday, showing them cowering on a forest floor as armed captors hit them with sticks. Thirty nine students are missing after gunmen stormed the Federal College of Forestry Mechanization in Kaduna state overnight on Thursday, the fourth school abduction in northern Nigeria since December. Video footage shared on social media showed roughly two dozen students begging for help in English and Hausa. One says the captors want a 500 million naira ($1.31 million) ransom. "If anybody comes to rescue them without the…