Here's a roundup of the AJC Holiday Heroes for 2011, honoring local residents making a difference.ExploreRosa Arnold-Colbert: Slain son inspires outreach programExploreRite Aid in Dallas: Co-workers help out with medical costsExploreMaria Lee: Echo Effect founder wants ‘kids to know they are loved’ExploreAshley Crantas: Caring words brighten livesExploreSean Hamilton: 10-year-old helps feed, comfort the homelessExploreFrances Smith: Foster kids feel her loveExploreGabrielle Moore: She has ‘a real passion for doing the right thing’ExploreRev. Carl McRae: Answering call to serveExploreEdgar Evans: Man honored for saving another’s lifeExploreMore AJC Holiday HeroesMore StoriesThe LatestCredit: Courtesy of Atlanta Botanical GardenCelebrate mom this weekend in Georgia with blooms and butterfliesReview: Out Front’s world premiere gay musical ‘Trick!’ is a lighthearted joyAuthor events May 9-15FeaturedCredit: Jason Getz / Jason.Getz@ajc.comAtlanta’s recovering office market braces for potential tariff impactFears that tariffs could spark a recession, increase layoffs and spike construction costs have the office sector on pins and needles.What’s in a name? New MARTA station name a nod to sports before World CupMARTA’s Board of Directors voted to change the name in time for the FIFA games and the 300,000 visitors expected to descend on Atlanta.Trooper pulled to safety after patrol vehicle overturns in South Georgia creekA Georgia State Patrol trooper is recovering after his patrol vehicle went into a creek during a pursuit and other officers pulled him to safety.