Russian Knights Su-30SM fighter jets perform during the 15th Langkawi International Maritime and Aerospace Exhibition (LIMA) in Langkawi, Malaysia, March 27, 2019. The 15th Langkawi International Maritime and Aerospace Exhibition (LIMA) kicked off on Tuesday, with defense companies from around the globe vying for a bigger share in the Asian defense industry. 390 companies from the defense and commercial industry from 31 countries and regions are participating in the five-day event. (Xinhua/Zhu Wei)