>>reenivasan: annie karni from "the new york times" joining us from washington tonight, thank you so much. >> thank y. >> >> sreenivaa san: witlitical stalemate in venezuela, the humanitarian crisis there continues to escalate. aid from the united states has been blocked at the colombia- venezuela border, with supplies and potentially life-saving medicines, out of reach r those who desperately need them s john ray reports from caracas, where he documented the dete system. health care >> reporter: nighttime in the most dangerous capital in the world, but only that the late four is it safe to us see the city's daerveght secrets. darkest secret. the hospit one of the biggest in caracas, and a doctor too scared to show his face. "if they catch us, i'll go to jail," he says. there is barely enough light to see, but in the rusting beds piled in corridors, enough to show a health system n total collapse. into a dirty and dlapidate ward, our guide says the lack even basic medicines. this is pedro garcia, 58 years old. he's been here for 13 long and agonizing months. "i feel like i've been ab