PRAGUE, June 25 (Xinhua) -- Slovak Defense Minister Jaroslav Nad, Czech Defense Minister Lubomir Metnar, Polish Deputy Defense Minister Pawel Wozny, and Hungarian Defense Minister Tibor Benko (from L to R) attend a press conference in Prague, the Czech Republic, on June 24, 2020. Defense ministers of Hungary, the Czech Republic, and Slovakia, and deputy defense minister of Poland, met here Wednesday to discuss mutual defense alliance before the handover of the groups presidency from the Czech Republic to Poland.