What is China up to in the Middle East? How is its massive Belt and Road infrastructure project affecting U.S. foreign policy and American citizens? Asha Castleberry-Hernandez, senior advisor in the U.S. State Department's Bureau of Near Eastern Affairs, discusses all of this, plus vaccine diplomacy, energy, and human rights, as she shares some of the Biden administration's thinking on these major issues with "Doorstep" co-hosts Tatiana Serafin and Nick Gvosdev.