been here since february they were put in place to prevent the opposition bringing in aid supplies migiro so as a pretext for foreign military intervention. since then venezuela has remained in political deadlock president maduro has the support of the country's military and powerful allies in china and russia. but the head of the opposition says he's the country's rightful leader and has been recognized as interim president by more than 50 countries including the u.s. and germany. it's not clear how long this crossing will remain open most of those here are traveling to colombia just for the day but the u.n. says that almost 4000000 venezuelans 15 percent of the population have fled abroad to. neighboring countries are struggling to cope with the influx of refugees actress angelina jolie visiting a camp and colombia as a special envoy for the un's refugee agency warns that resources are wearing. the impact on public services here in colombia is staggering some border hospitals are now providing emergency health care to as many venezuelans as colombia was. on both sides of the border vene