Press the green flag.
https://www.google.com/search?safe=strict&rlz=1CASQGI_enUS815&biw=1366&bih=697&tbm=isch&sa=1&ei=oyiRXOOTOaOjjwSRx574BA&q=military+checkpoint+gate+with+no+people&oq=military+checkpoint+gate+with+no+people&gs_l=img.3...2866.3234..3678...0.0..0.55.105.2......1....1..gws-wiz-img.BKnwpUkzB6c#imgrc=eO2eQ_NR8ufmGM: https://www.google.com/search?safe=strict&rlz=1CASQGI_enUS815&biw=1366&bih=697&tbm=isch&sa=1&ei=oyiRXOOTOaOjjwSRx574BA&q=military+checkpoint+gate+with+no+people&oq=military+checkpoint+gate+with+no+people&gs_l=img.3...2866.3234..3678...0.0..0.55.105.2......1....1..gws-wiz-img.BKnwpUkzB6c#imgrc=eO2eQ_NR8ufmGM:
