January 17, 2013 9:06 am Gun Law Battle “Difficult” President Obama presents what some feel are controversial gun control measures. President Obama calls it “difficult,” the NRA calls it the “fight of the century. NBC’s Tracie Potts reports. US & World Videos 1:45 NYPD enters Columbia University in riot gear to clear protest 3:21 Katy Perry's surprising regret about cheeseburger Met Gala look 4:28 ‘Apples Never Fall' and ‘Jurassic Park' star Sam Neill reveals his real name 2:04 Arrests made, camps removed during pro-Palestinian protest at UConn 1:01 Biden administration plans to reclassify marijuana as a Schedule III drug