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B |     JERUSALEM -- Since Israel activated the Iron Dome in 2011, the cutting-edge rocket-defense system has intercepted thousands of rockets fired from the Gaza Strip.The system has given residents a sense of security, and Israelis can often be seen watching the projectiles flying through the skies and destroying their targets overhead.But the current war with Hamas might be its stiffest challenge yet.In just two weeks, Hamas has fired 7,000 rockets toward Israel, according to the Israeli military. That is more than any of the previous four wars fought between Israel and Hamas since the militant group seized power in Gaza in 2007. On Oct. 7 alone, the first day of fighting, Hamas launched at least 2,000 rockets, according to data from West Point. Lebanon's Hezbollah has also fired hundreds of rockets along Israel's northern front since the fighting began.Most of the rockets have been intercepted. But some have managed to get through, killing at least 11 people and hitting buildings as far away as Tel Aviv, according to Israeli officials.Here is a look at the accomplishments — and limitations — of the Iron Dome.The Iron Dome is a series of batteries that use radars to detect incoming short-range rockets and intercept them.Each battery has three or four launchers, 20 missiles, and a radar, according to Raytheon, the U.S. defense giant that co-produces the system with Israel's Rafael Defense Systems.Once the radar detects a rocket, the system determines whether the rocket is headed toward a populated area. If so, it launches a missile to intercept and destroy the rocket. If the system determines the rocket is headed to an open area or into the sea, it is allowed to land, thus conserving missiles. According to the military, all interceptions occur in Israeli airspace.The military declined to comment on how many Iron Dome batteries are currently deployed. But as of 2021, Israel had 10 batteries scattered around the country, each able to defend a territory of 60 square miles (155 square kilometers), according to Raytheon. It is roughly 90% effective, according to Rafael.But it can get overwhelmed if a mass barrage of rockets is fired, allowing some to slip through. While it has performed well so far, the risk could be raised if Hezbollah enters the war. Hezbollah has an estimated 150,000 rockets and missiles.Each missile costs an estimated $40,000 to $50,000, according to the Institute for National Security Studies, a Tel Aviv think tank.The U.S. has invested heavily in the system, helping with development costs and replenishing it during times of fighting.President Joe Biden has said he will ask Congress for $14.3 billion in military aid for Israel. The majority of that would help with air and missile defense systems, according to the White House.“We’re surging additional military assistance, including ammunition and interceptors to replenish Iron Dome,” Biden said.___Find more of AP’s coverage at https://apnews.com/hub/israel-hamas-war。

C | 王楚钦、徐海东都是现役中国乒乓球一队的运动员，不过成绩差距比较大，前者早已是奥运会男团、混双金牌得主，此外还在各大赛事的各大项目中斩获冠军，其中就包括世乒赛、世界杯男单称王，排名稳居世界第1位。徐海东是目前乒坛比较少见的直拍打法高手，目前排名仅在世界第249位，从未入选过奥运会、世乒赛、世界杯等世界大赛名单。比赛开始后，徐海东在首局拼得非常凶，多次取得领先优势压制对手，王楚钦则在1-4落后的情况下奋起反击并以6-5反超比分，打出了左手横拍运动员对右手直拍选手的威胁，但徐海东也迅速追赶再次战平对手，但很快便连续丢分出现4个局点，最终被王楚钦以11-6拔得头筹。第二局王楚钦开局取得领先优势但很快被追至5-5平，随后双方纠缠至9-9平后才分出胜负，结果王楚钦以9-11被逆转，双方由此而回到同一起跑线。第三局双方再次打得难解难分，王楚钦领先比分后被徐海东咬住并战至4-4平，中间段两人展开了非常精彩的相持球对抗，王楚钦先得2分后台内球失误被追至6-5于是用掉暂停权。暂停结束后，王楚钦继续失误被追至6-6、7-7平，此时比赛用球受损，裁判更换器材后两人继续投入比赛又战至8-8、9-9平。再次进入关键球争夺环节后，王楚钦反手对抗失误9-10被反超，再丢1分后以9-11无缘拿下第三局。