A community calendar in the Sept. 9 Fairfax Extra listed an incorrect time for a tai chi practice scheduled for tomorrow at McLean Central Park. The practice is to be held from 8 to 9 a.m., not 8 to 9 p.m. (Published 9/10/04)

Thursday 9

CENTREVILLE CIVIL WAR TALK, historian Wally Owen discusses "The Civil War Defenses of Washington," a meeting of the Bull Run Civil War Round Table, 7:15 p.m., Centreville Regional Library, 14200 St. Germain Dr. Free. 703-675-0702.

Friday 10

VIENNA ADVENTURE WALKERS, moderate pace on walking paths in Fairfax County, 10-11 a.m. Fridays, through Oct. 15, locations discussed at first meeting, Vienna Community Center, 120 Cherry St. SE. $15; Vienna residents, $12; preregistration required. 703-255-6360.

NATIONAL WORLD WAR II MEMORIAL TRIP, by bus, with sightseeing and lunch on your own, sponsored by the Vienna Parks and Recreation Department, 10 a.m.-2 p.m., bus departs from and returns to the Vienna Community Center, 120 Cherry St. SE. $17.50; Vienna residents, $14; preregistration required. 703-255-6360.

VIENNA CHAMBER CONCERT, Vienna Community Band Sax Quartet, bring a chair or blanket, 6:30 p.m., lawn of Vienna's historic Freeman House, 131 Church St. NE. Free. 703-255-7842.

CONCERT, ICE SKATING, ice skate while bands perform on two stages for the Rock 'n Blades event, sponsored by the Fairfax County Park Authority, 7:30 p.m., Mount Vernon RECenter, 2017 Belle View Blvd., Alexandria. $10. 703-768-3224.

Saturday 11

MCLEAN TAI CHI PRACTICE, for beginners, slow exercise to enhance well-being, sponsored by the T'ai Chi Ch'uan Study Center of the Washington, D.C. Metro Area, 8-9 p.m., McLean Central Park, basketball court behind Dolley Madison Public Library, 1244 Oak Ridge Ave. Free. 703-759-9141.

ALEXANDRIA GARDEN MARKET, plants, tools, containers and ornaments for sale; master gardeners answer questions, 9 a.m.-1 p.m., Green Spring Gardens Park, 4603 Green Spring Rd. (3.5 miles east on Route 236 from Beltway Exit 6), Alexandria. Free admission. 703-642-5173.

NATIONAL CAPITAL CAT SHOW, judging of pure breeds and household pets; cat-related items for sale, rescued cats available for adoption, 9:30 a.m.-5 p.m. Saturday, 9 a.m.-4 p.m. Sunday, Dulles Expo and Conference Center, Willard Road and Route 28, Chantilly. $8; seniors, $5. 703-421-7250.

SPRINGFIELD COMMUNITY FESTIVAL, a train ride, a moon bounce, a big slide, games, prizes, crafts, food and live entertainment, 10 a.m.-3 p.m., St. John's United Methodist Church, 5312 Backlick Rd., Springfield. 50 cents per ticket for rides and games. 703-256-6655.

GREAT FALLS INDIAN FESTIVAL, members of four Virginia tribes demonstrate tool-making, flint-knapping, dancing, drumming, storytelling, bow-shooting, spear-throwing and dugout canoe construction; crafts for sale and archaeological and other historic objects displayed, 10 a.m.-4 p.m., Riverbend Park, 8700 Potomac Hills St., Great Falls. $5; 2 and younger, free. 703-759-9018.

UNIVERSITY WOMEN OPEN HOUSE, Bagels and Blue Jeans event, information about programs of the Vienna Branch of the American Association of University Women, 10:30 a.m.-12:30 p.m., Patrick Henry Library, 101 Maple Ave. E., Vienna. Free. 703-442-0476.

BURKE FESTIVAL, arts and crafts, antiques, food, live entertainment, children's rides and games, 11 a.m.-5 p.m. Saturday and Sunday; wine tasting, 5:30-9 p.m. Saturday, Burke Centre, 6060 Burke Centre Pkwy. Free admission; wine tasting, $8. 703-978-1073.

F. MURRAY ABRAHAM PERFORMANCE, the Theater of the First Amendment presents the actor in a reading of the classic play "Nathan the Wise," about 12th-century Jerusalem, 8 p.m.; plus a talk by John L. Esposito, author of "Unholy War: Terror in the Name of Islam," 7 p.m., George Mason University, Center for the Arts, Concert Hall, Fairfax. $25. 703-218-6500.

Sunday 12

POHICK BAY CANOE TRIP, guided by a park naturalist to explore wildlife habitats, bring binoculars and a field guide, 8 a.m.-noon, Pohick Bay Regional Park, 6501 Pohick Bay Dr., Lorton. $25; reservations required. 703-339-6104.

HERNDON CAR SHOW, competition for all years, makes and models, plus a motorcycle competition, hosted by the Herndon Police and Citizen Support Team, gates open 8 a.m.; show, 10 a.m., Herndon Municipal Center, Lynn and Center streets. Free. 703-437-1278.

CHANTILLY QUILT SHOW, antique and new quilts, patterns, fabrics and other quilt-related merchandise; demonstration of quilting, spinning, weaving and sewing; appraisers evaluate heirloom quilts; music by the Fairfax Symphony German Band, String Quartet and Woodwind Quintet; and food vendors, 10 a.m.-4:30 p.m., Sully Historic Site, 3601 Sully Rd., Chantilly. $8; seniors, $7; children, $5; appraisals, $5 each. 703-437-1794.

PARK WALK, TEA, a guided tour of the Virginia Native Plant Trail followed by a full English tea, wear comfortable shoes, 1-3 p.m., Green Spring Gardens Park, 4603 Green Spring Rd. (3.5 miles east on Route 236 from Beltway Exit 6), Alexandria. $22; reservations required. 703-941-7987.

RESTON TEA DANCE, for 55 and older and all skills; fox trot, swing, cha-cha and waltz, no partner necessary, 2:30-4:30 p.m., Reston Community Center, 2310 Colts Neck Rd. $3. 703-476-4500.

FALLS CHURCH CHRYSANTHEMUM TALK, Gene Mertes and Jesse Terres discuss how to grow prize-winning chrysanthemums, sponsored by the Old Dominion Chrysanthemum Society, 3 p.m., Falls Church Community Center, 223 Little Falls St. Free. 703-560-8776.

RESTON YMCA FEST, swimming, archery, arts and crafts, volleyball, basketball, pie-eating contests and a barbecue, in celebration of the fourth anniversary of the Reston YMCA, 3-6 p.m., 12196 Sunset Hills Rd. Free admission; food, $3 (children, $2). 703-742-8800.

Monday 13

VIENNA MONDAY MORNING WALKERS, moderate pace, three-mile route on and near the W&OD trail, 10-11 a.m. Mondays,

through Oct. 25, meet at Vienna Community Center, 120 Cherry St. SE. $8; Vienna residents, $5; preregistration required, 703-255-6360.

FAIRFAX COUNTY BOARD MEETING, 9:30 a.m., Fairfax County Government Center, Board Auditorium, 12000 Government Center Pkwy. 703-324-3151.

Tuesday 14

RESTON SENIORS MOVIE, for 55 and older, "Mr. Smith Goes to Washington," plus a talk about American politics by local historian Carol Bessette, 1-4 p.m., Reston Community Center at Lake Anne, 1609-A Washington Plaza. $10; Reston residents, $5. 703-476-4500.

SWEET ADELINES GUEST NIGHT, female members of the public are invited to sing with the Vienna-Falls Chorus of Sweet Adelines International, 7 p.m., Fairfax High School, 3500 Old Lee Hwy., Fairfax. Free. 703-242-7464.

FAIRFAX CITY COUNCIL MEETING, 7 p.m., Fairfax City Hall, 10455 Armstrong St. 703-385-7935.

FALLS CHURCH ACCORDION PROGRAM, Peter DiGiovanni demonstrates how to play by ear; bring your instrument and music stand and play or just listen, a meeting of the Washington Metropolitan Accordion Society, 7:30 p.m., Sleepy Hollow United Methodist Church, 3435 Sleepy Hollow Rd., Falls Church. Free. 703-671-5395.

HERNDON TOWN COUNCIL MEETING, 7:30 p.m., Herndon Council Chambers, 765 Lynn St. 703-435-6804.

HERNDON ENGLISH COUNTRY DANCING, no partner necessary, all dances taught by leader Barbara Harding, with flutist Colleen Reed, 7:45 p.m., Harding Hall, 730 Jackson St., Herndon. $3. 703-437-3615.

FAIRFAX SQUARE DANCING, plus level dancing for singles or couples, sponsored by the Bizzy Bees Square Dance Club, 8-10 p.m., Sydney Lanier Middle School, cafeteria, 3710 Bevan Dr., Fairfax. $5. 703-978-4968.

Wednesday 15

HARRIET TUBMAN LECTURE, historian Catherine Clinton discusses "Harriet Tubman's Road to Freedom," sponsored by the Annandale Campus Lyceum Committee of Northern Virginia Community College, noon, the college's Ernst Community Cultural Center, 8333 Little River Tpk., Annandale. Free. 703-323-3274.

MCLEAN ORGAN RECITAL, by Daniel Gawthrop, 1 p.m., St. Luke Catholic Church, 7001 Georgetown Pike, McLean. Free. 703-356-0670.

Thursday 16

VIENNA CONTINUING EDUCATION, for 50 and older, open house for the Shepherds Center of Oakton-Vienna, with information about its fall courses (Sept. 23-Nov. 1), topics include tai chi, bridge, world affairs, health, drawing and collage, 10 a.m.-noon, Seventh-day Adventist Church, 344 Courthouse Rd., Vienna. Open house, free; fees for courses. 703-281-0538.

MCLEAN ROSE LECTURE, Ken Hrechka discusses how to exhibit roses at shows, sponsored by the Potomac Rose Society, 7:30-9:30 p.m., McLean Governmental Center, 1437 Balls Hill Rd. Free. 301-869-4948.

OFFICER'S IRAQ WAR TALK, Navy Capt. Vincent Racanelli discusses his former service as a Seabee in Iraq, sponsored by Chapter 227 of the Vietnam Veterans of America, 7:30 p.m., Neighbors Restaurant, 262D Cedar Lane, Cedar Lane Shopping Center, Vienna. Free admission; optional to buy dinner. 703-255-0353.

-- Compiled by JEAN MACK

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Cats converge on the Dulles Expo and Conference Center this weekend for the National Capital Cat Show.