When he returns to Washington on Tuesday, Rep. Luis V. Gutierrez (D-IL) will introduce legislation to curb the sale and trafficking of junk guns, the cheap handguns, sometimes known as “Saturday Night Specials” responsible for a huge percentage of the deaths and injuries in Chicago and around the nation.  Rep. Gutierrez, who sits on the Judiciary Committee’s Subcommittee on Crime, Terrorism, Homeland Security, and Investigations, made the announcement at a press conference in Chicago on Monday before holding a community meeting with Chicago clergy, community leaders and others to discuss gun-violence prevention strategies.