Russian honorary guards stand next to a coffin with the body of Russian Roman Filipov, the pilot of the Su-25 jet who ejected after Syrian insurgents shot down his plane traded fire with militants on the ground and then blew himself up to avoid being captured, during a funeral service in Voronezh, Russia, Thursday, Feb. 8, 2018. (Vadim Savitsky/Pool Photo via AP)
People lineup to pay their last respects to Russian Roman Filipov, the pilot of the Su-25 jet who ejected after Syrian insurgents shot down his plane traded fire with militants on the ground and then blew himself up to avoid being captured, during a funeral service in Voronezh, Russia, Thursday, Feb. 8, 2018. (Vadim Savitsky/Pool Photo via AP)
Russian honorary guards stand next to a coffin with the body of Russian Roman Filipov, the pilot of the Su-25 jet who ejected after Syrian insurgents shot down his plane traded fire with militants on the ground and then blew himself up to avoid being captured, during a funeral service in Voronezh, Russia, Thursday, Feb. 8, 2018. (Vadim Savitsky/Pool Photo via AP)
Russian officers carry a coffin with the body of Russian Roman Filipov, the pilot of the Su-25 jet who ejected after Syrian insurgents shot down his plane traded fire with militants on the ground and then blew himself up to avoid being captured, during a funeral service in Voronezh, Russia, Thursday, Feb. 8, 2018. (Vadim Savitsky/Pool Photo via AP)
A woman with a child put flowers at a coffin with the body of Russian Roman Filipov, the pilot of the Su-25 jet who ejected after Syrian insurgents shot down his plane traded fire with militants on the ground and then blew himself up to avoid being captured, during a funeral service in Voronezh, Russia, Thursday, Feb. 8, 2018. (Vadim Savitsky/Pool Photo via AP)
Russian woman crosses herself at a coffin with the body of Russian Roman Filipov, the pilot of the Su-25 jet who ejected after Syrian insurgents shot down his plane traded fire with militants on the ground and then blew himself up to avoid being captured, during a funeral service in Voronezh, Russia, Thursday, Feb. 8, 2018. (Vadim Savitsky/Pool Photo via AP)
Russian honorary guards stand next to a coffin with the body of Russian Roman Filipov, the pilot of the Su-25 jet who ejected after Syrian insurgents shot down his plane traded fire with militants on the ground and then blew himself up to avoid being captured, during a funeral service in Voronezh, Russia, Thursday, Feb. 8, 2018. (Vadim Savitsky/Pool Photo via AP)
A Russian officer holds a medal 'Hero of Russia' of Russian Roman Filipov, the pilot of the Su-25 jet who ejected after Syrian insurgents shot down his plane traded fire with militants on the ground and then blew himself up to avoid being captured, which was awarded posthumously, during a farewell service at Chkalovsky military airport, just outside Moscow, Russia, Thursday, Feb. 8, 2018. (Vadim Savitsky/Pool Photo via AP)
Russian honorary guards stand next to a coffin with the body of Russian Roman Filipov, the pilot of the Su-25 jet who ejected after Syrian insurgents shot down his plane traded fire with militants on the ground and then blew himself up to avoid being captured, during a farewell service at Chkalovsky military airport, just outside Moscow, Russia, Thursday, Feb. 8, 2018. (Vadim Savitsky/Pool Photo via AP)
Russian honour guards carry a coffin with the body of Russian Roman Filipov, the pilot of the Su-25 jet who ejected after Syrian insurgents shot down his plane traded fire with militants on the ground and then blew himself up to avoid being captured, during a farewell service at Chkalovsky military airport, just outside Moscow, Russia, Thursday, Feb. 8, 2018. (Vadim Savitsky/Pool Photo via AP)
A Russian officer holds a portrait of Russian Roman Filipov, the pilot of the Su-25 jet who ejected after Syrian insurgents shot down his plane traded fire with militants on the ground and then blew himself up to avoid being captured, during a farewell service at Chkalovsky military airport, just outside Moscow, Russia, Thursday, Feb. 8, 2018. (Vadim Savitsky/Pool Photo via AP)
Russian officers carry out from a plane a coffin with the body of Russian Roman Filipov, the pilot of the Su-25 jet who ejected after Syrian insurgents shot down his plane traded fire with militants on the ground and then blew himself up to avoid being captured, during a funeral service in Voronezh, Russia, Thursday, Feb. 8, 2018. (Vadim Savitsky/Pool Photo via AP)
Russian honour guards stand next to a coffin with the body of Russian Roman Filipov, the pilot of the Su-25 jet who ejected after Syrian insurgents shot down his plane traded fire with militants on the ground and then blew himself up to avoid being captured, during a farewell service at Chkalovsky military airport, just outside Moscow, Russia, Thursday, Feb. 8, 2018. (Vadim Savitsky/Pool Photo via AP)