washington unite state friday welcome first step saudi arabia allow humanitarian aid reach yemen call negotiations country conflict coalition fight iran-aligned houthi movement yemen say wednesday would allow aid red sea port hodeidah salif well u.n. flight sanaa two weeks blockade country million people face famine yemen survival dependent international assistance full immediate implementation announce measure first step ensure food medicine fuel reach yemeni people aid organizations frontlines mitigate humanitarian crisis able essential work white house say statement look forward additional step facilitate unfettered flow humanitarian commercial goods port entry point need add u.n. spokesman say saudi-led coalition give unite nations permission resume flight aid workers houthi-controlled capital saturday dock ship load wheat medical supply reuters report wednesday u.s. secretary state rex tillerson ask saudi arabia ease blockade u.s.-backed coalition close air land sea access nov. move say stop flow arm houthis iran action come saudi arabia intercept missile fire toward riyadh iran deny supply weapons white house say commit support saudi arabia gulf partner iranian islamic revolutionary guard corps aggression blatant violations international law saudi-led coalition target houthis since seize part yemen 2015 include capital sanaa force president abd-rabbu mansour hadi flee houthis draw mainly yemen zaidi shi ite minority ally long-serving former president ali abdullah saleh control much country unite nations mediate conflict without much success unite state continue believe devastate conflict suffer cause must bring end political negotiations white house say u.s. back saudi 'first step address yemen crisis