To please critics, Sinclair retreats on pledge to sell; NABJ leader "concerned" about Media General-LIN merger; with 77% approval, blacks are biggest backers of ACA; video games said to reflect media view of blacks as violent; NPR ombudsman urges that "Redskins" be avoided; students Say TMZ insults Mexicans, community colleges; Sheila Johnson wants students to watch public affairs (3/21/14)