![A Swiss Air Force Super Puma Cougar helicopter releases flares during a flight demonstration over the Axalp in the Bernese Oberland, Switzerland, Oct. 10, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/10/11/7a2e0525549343558baa8e300fffa32e.jpg)
A Swiss Air Force Super Puma Cougar helicopter releases flares during a flight demonstration over the Axalp in the Bernese Oberland, Switzerland, Oct. 10, 2018. (Photo/Agencies)
![Ammunition shot by a Swiss Air Force fighter jet explodes on a target during a flight demonstration over the Axalp in the Bernese Oberland, Switzerland, Oct. 10, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/10/11/c61bc95075c14c06bfcd454c2b361e99.jpg)
Ammunition shot by a Swiss Air Force fighter jet explodes on a target during a flight demonstration over the Axalp in the Bernese Oberland, Switzerland, Oct. 10, 2018. (Photo/Agencies)
![A Swiss Air Force F/A 18 Hornet fighter jet performs during a flight demonstration of the Swiss Air Force over the Axalp in the Bernese Oberland, Switzerland, Oct. 10, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/10/11/40cbdd7986a14c16aac26616f65328f4.jpg)
A Swiss Air Force F/A 18 Hornet fighter jet performs during a flight demonstration of the Swiss Air Force over the Axalp in the Bernese Oberland, Switzerland, Oct. 10, 2018. (Photo/Agencies)
![A Swiss Air Force F/A 18 Hornet fighter jet releases flares during a flight demonstration over the Axalp in the Bernese Oberland, Switzerland, Oct. 10, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/10/11/51efda03f79046d299beb61a7c4012df.jpg)
A Swiss Air Force F/A 18 Hornet fighter jet releases flares during a flight demonstration over the Axalp in the Bernese Oberland, Switzerland, Oct. 10, 2018. (Photo/Agencies)
![Swiss Air Force F/A 18 Hornet fighter jets perform during a flight demonstration of the Swiss Air Force over the Axalp in the Bernese Oberland, Switzerland, Oct. 10, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/10/11/3853326ad86840f8b4c76c751ce91389.jpg)
Swiss Air Force F/A 18 Hornet fighter jets perform during a flight demonstration of the Swiss Air Force over the Axalp in the Bernese Oberland, Switzerland, Oct. 10, 2018. (Photo/Agencies)
![Members of the Patrouille Suisse perform in their Swiss Air Force Northrop F-5E Tiger II fighter jets during a flight demonstration of the Swiss Air Force over the Axalp in the Bernese Oberland, Switzerland, Oct. 10, 2018. (Photo/Agencies)](http://www.ecns.cn/hd/2018/10/11/5db63705ca104dcfbc0545ea8c7be293.jpg)
Members of the Patrouille Suisse perform in their Swiss Air Force Northrop F-5E Tiger II fighter jets during a flight demonstration of the Swiss Air Force over the Axalp in the Bernese Oberland, Switzerland, Oct. 10, 2018. (Photo/Agencies)
![Members of the Patrouille Suisse perform the so-called \](http://www.ecns.cn/hd/2018/10/11/7c018544266648a28be2dfe8104dfbd3.jpg)
Members of the Patrouille Suisse perform the so-called "Tunnel" formation in their Swiss Air Force Northrop F-5E Tiger II fighter jets during a flight demonstration of the Swiss Air Force over the Axalp in the Bernese Oberland, Switzerland, Oct. 10, 2018. (Photo/Agencies)