NEW YORK -- In a less-traveled part of the 46-acre Billie Jean King National Tennis Center, an imposing black metal fence offers a reminder of the multiple security worries that come with hosting the U.S. Open.New York Police Department counterterrorism officials insisted that the fence, near a new 8,000-seat grandstand stadium, be reinforced earlier this year with thick strands of cable capable of withstanding a crash from a truck loaded with explosives.A lot of this stuff is off the radar, but it goes back to whats happening in the world, the events security director, Michael Rodriguez, said during a flurry of last-minute preparations for Mondays opening matches.Attacks in Europe and mass shootings in the U.S. have created a climate thats added to vigilance over this years U.S. Open, which already posed daunting security challenges because of its sheer size: 700,000 spectators over two weeks packed into two stadiums, two grandstands and other seating at more than a dozen other tennis courts, all connected by sprawling pedestrian walkways.Officials say they know of no credible threats against a Grand Slam event that happens to end with the mens final on the 15th anniversary of 9/11. But the NYPD, which ordinarily has hundreds of officers in and around the tennis center, plans to increase its presence this year. Thats on top of the tournaments roughly 300 private security guards.Layers of protection include installation of temporary closed-circuit surveillance cameras, including some perched atop the 23,771-seat Arthur Ashe Stadium, along with devices to detect chemical, biological or radiation risks.Ive already warned people theyre going to see it, Rodriguez said of the extra security. And they should feel good about seeing it.Rodriguez, a former NYPD detective sergeant and supervisor for the Joint Terrorism Task Force, said he meets twice a day with representatives from the various local and federal law enforcement agencies monitoring the U.S. Open. Sample topic: the difficulties of drone mitigation.Such widening risks were underscored last year when a small drone crashed into the stands during a match -- it turned out a science teacher lost control of it while flying it in a nearby park -- and in 2014, when an NYPD intelligence analyst told a gathering of private security directors that an al-Qaida online publication encouraged a car-bomb attack on the tournament.Just outside the gates of the tennis center, the NYPD will keep heavily armed officers trained to respond to terror attacks at the ready. As with other with other events like New Years Eve in Times Square, plainclothes officers will mix with the crowds.Other defenses include strict screening checkpoints for the throng of spectators. In the past decade, the U.S. Open became among the first sporting events to prohibit backpacks and use airport-style, walk-through metal detectors instead of less-reliable wands to check people for weapons.The event also has a rigorous inspection system for the more than 1,600 trucks that make deliveries during the event. Drivers are vetted, given a bar code and directed to an inspection point deliberately located a quarter-mile from the tennis center before they can enter the grounds.Last week, United States Tennis Association officials held a meeting at the tennis center with their counterparts from the French Open and other major tournaments to discuss ways to keep spectators safe.Anything can happen, Rodriguez said. The question is, `What are we doing to minimize the risks?With success at hardening the entrances at big tournaments, security directors have turned their attention to deterring threats to the potential target created by fans congregating in the longer lines to get in, said Richard Bower, owner of Bower Events, Inc., a private security firm that consults on the BNP Paribus Open in Indian Wells, California.That event now deploys SWAT and plainclothes officers, along with police dogs, where the lines form.Part of it is about making people approaching the event feel safe, Bower said.Sally Kane, 71, of New Rochelle, one of the many fans to turn out last week for free admission qualifying matches, scoffed at the potential risks.Terrorists dont want to come here, she said. What really bothered her was having to pay to store her metal water bottle -- on a list of banned items -- outside the center.Im very annoyed, Kane said. I would have felt just as safe with my water bottle. 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The team also announced Tuesday that the Braves will wear a commemorative patch on the right sleeve during the season. The patch, shaped like home plate, carries the number 715, Aarons autograph and a "40th Anniversary" banner. LOUISVILLE, Ky. -- If fifth-ranked Louisville wants to remain in the playoff discussion, the Cardinals will have to do something theyve never done before.Louisville (8-1, 6-1 Atlantic Coast Conference, No. 7 CFB) can end with their best league finish by beating Wake Forest (6-3, 3-2) on Saturday night. While coach Bobby Petrino expected improvement in the Cardinals third year in the league after back-to-back 5-3 finishes, this year has included a breakthrough against the top tier with a 63-20 pounding of then-No. 2 Florida State that thrust Louisville and Heisman Trophy front-runner Lamar Jackson onto the national scene.Though the Cardinals will need a lot of help to overtake No. 2 Clemson (9-0, 6-0 ACC) -- which dealt them their only league loss last month -- Petrino likes still having a shot at the Atlantic Division.We went into the year with the goal to compete for a national championship, Petrino said on Monday. I really liked our team when we started this off and I felt like we had a shot at it. I think weve played well and well just keep working at it.No matter how the ACC shakes out, Louisville remains hopeful of being considered for the four-team playoff. The second ranking comes Tuesday night, and the question is whether the Cardinals standing will improve with Texas A&M (No. 4 CFP) sustaining its second loss.Petrino said players were upset by last weeks initial ranking that made their road to the playoff more difficult. But it told the Cardinals that improvement was needed after close calls such as their 32-25 escape at Virginia and judging from Saturdays 52-7 rout of Boston College , total domination is now their objective.We just felt like we shouldve been (rankeed) higher, cornerback Stacy Thomas said, but we dont have any say-so in that and just have to play each week and show we deserve to be there.dddddddddddd Whenever theres a team ahead of us that thinks theyre better than us, thats motivation.Petrino seemed bothered by having to run up the score but didnt say whether that would be the norm to influence the playoff committee.The only thing that we can control is how we play and how we go out and perform and win games, he said.Jackson certainly seemed inspired to do his part with another multiple-touchdown performance that bolstered his Heisman credentials.The sophomore quarterback got Louisville out to a 35-0 lead by accounting for five TDs before leaving the game before halftime with forearm cramps and finger numbness. Jackson returned to score twice more in the third quarter, capping another big day with a 53-yard scoring run that raised his season TD total to 45.Jackson and Louisville now face an improved Wake Forest team thats bowl eligible for the first time since 2011, when the Demon Deacons played in the Music City Bowl. The Cardinals have won all three series meetings but after last years 20-19 squeaker over Wake in Winston-Salem, theyre not taking anything for granted.Especially with margin of victory possibly determining their playoff chances.Thats our philosophy as an offense, to score every time, center Tobijah Hughley said. Were really worried about what we can control, so were going to focus on scoring every time we get the chance.---More AP college football: www.collegefootball.ap.org. ' ' '