AP) LOS ANGELES The marches against proposed immigration legislation are spreading in Los Angeles. Some 1,500 L.A. students who have walked out of class are gathered outside Los Angeles City Hall. L.A. school district officials said some 1,000 students from Los Angeles High School on the 4600 block of Olympic Avenue have walked out and are reportedly heading toward Hollywood High School on the 1500 block of North Highland Avenue. Hundreds of students have already left Huntington Park High School, some scaling fences that school officials locked to avoid a walkout. L.A. school district spokeswoman Monica Carazo said students have...