(170605) — WARSAW, June 5, 2017 (Xinhua) — Polish taxi drivers block traffic in Warsaw, Poland, June 5, 2017. Hundreds of taxi drivers in Poland’s four largest cities drove at a crawl during Monday’s morning rush-hour, blocking roads in a protest aimed at drawing the government’s attention to the rising number of unlicensed drivers who offer transport services. (Xinhua/Chen Xu) (dtf)