The main oil fields are in territory in the country's northeast, a region where the US-allied Kurdish Syrian Democratic Forces hold sway and depend on the oil for income.
The United States has been the world's hardest-hit country by the coronavirus pandemic, in absolute terms, with 436,000 deaths and nearly 26 million cases.
Austin remained vague about specific projects he would undertake as head of the US military, but in his written responses to the senators, he said he planned to re-examine outgoing President Donald Trump's proposals to pull US troops out of Germany and Somalia.
At least one bus company has halted bus trips to Washington ahead of the inauguration, while Airbnb canceled home-sharing reservations in the Washington D.C. area for the week of Biden's inauguration.
Trump unilaterally withdrew the US from a landmark nuclear deal with Iran and world powers in 2018 and launched a "maximum pressure" campaign against Tehran, reimposing and reinforcing crippling sanctions.
President-elect Joe Biden has pledged to halt arms sales to Saudi Arabia, the Middle East’s biggest buyer of American weapons, in a bid to pressure Riyadh to end a war in Yemen.
Miller released a statement Monday saying the Pentagon's coordination efforts with the transition team "already surpass those of recent administrations with over three weeks to go."
The company argued the latest Pentagon review was "riddled with errors even more egregious than those that plagued the initial award," and that the Pentagon "manipulated its evaluations to a degree that belies any facade of rationality."
The Pentagon announced last week that the secretary and top military officers would get vaccinated voluntarily and publicly to help spread the message about the treatment's effectiveness and safety.
Since then Iran has been expected to try to retaliate, and even more so since the assassination inside Iran of senior nuclear scientist Mohsen Fakhrizadeh last month, which Tehran blames on Israel.
Austin should meet with members of the House committee "so they can ask questions about civilian control of the military.
The fact is, Austin's many strengths and his intimate knowledge of the Department of Defense and our government are uniquely matched to the challenges and crises we face.