U.S. Vice President Kamala Harris looks on as she talks to reporters on the tarmac before boarding her plane to depart from Atlanta, Georgia, U.S. June 18, 2021. REUTERS/Jonathan Ernst

U.S. Vice President Kamala Harris talks to reporters on the tarmac before boarding her plane to depart from Atlanta, Georgia, U.S. June 18, 2021. REUTERS/Jonathan Ernst

U.S. Vice President Kamala Harris talks to reporters on the tarmac before boarding her plane to depart from Atlanta, Georgia, U.S. June 18, 2021. REUTERS/Jonathan Ernst

U.S. Vice President Kamala Harris gestures as she talks to reporters on the tarmac before boarding her plane to depart from Atlanta, Georgia, U.S. June 18, 2021. REUTERS/Jonathan Ernst

U.S. Vice President Kamala Harris boards her plane to depart from Atlanta, Georgia, U.S. June 18, 2021. REUTERS/Jonathan Ernst

U.S. Vice President Kamala Harris talks to reporters on the tarmac before boarding her plane to depart from Atlanta, Georgia, U.S. June 18, 2021. REUTERS/Jonathan Ernst

U.S. Vice President Kamala Harris talks to reporters on the tarmac before boarding her plane to depart from Atlanta, Georgia, U.S. June 18, 2021. REUTERS/Jonathan Ernst

U.S. Vice President Kamala Harris talks to reporters on the tarmac before boarding her plane to depart from Atlanta, Georgia, U.S. June 18, 2021. REUTERS/Jonathan Ernst

U.S. President Joe Biden acknowledges reporters and visitors as he departs on travel to Wilmington, Delaware from the South Lawn of the White House in Washington, U.S., June 18, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden boards Marine One as he departs on travel to Wilmington, Delaware from the South Lawn of the White House in Washington, U.S., June 18, 2021. REUTERS/Carlos Barria

U.S. President Joe Biden departs after speaking about the administration's coronavirus disease (COVID-19) response and the vaccination program during brief remarks in the State Dining Room of the White House in Washington, U.S., June 18, 2021. REUTERS/Carlos Barria

Houseboats are anchored in low water levels at Lake Oroville, which is the second largest reservoir in California and according to daily reports of the state's Department of Water Resources is near 35% capacity, near Oroville, California, U.S., June 16, 2021. Picture taken June 16, 2021. REUTERS/Aude Guerrucci

U.S. Secretary of the Treasury Janet Yellen and Mexican Finance Minister Arturo Herrera Gutierrez meet at the U.S. Department of the Treasury in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein

U.S. Secretary of the Treasury Janet Yellen and Mexican Finance Minister Arturo Herrera Gutierrez meet at the U.S. Department of the Treasury in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein

U.S. Secretary of the Treasury Janet Yellen greets Mexican Finance Minister Arturo Herrera Gutierrez as they meet at the U.S. Department of the Treasury in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein

U.S. Secretary of the Treasury Janet Yellen and Mexican Finance Minister Arturo Herrera Gutierrez meet at the U.S. Department of the Treasury in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein

U.S. Secretary of the Treasury Janet Yellen and Mexican Finance Minister Arturo Herrera Gutierrez meet at the U.S. Department of the Treasury in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein

U.S. Secretary of the Treasury Janet Yellen and Mexican Finance Minister Arturo Herrera Gutierrez meet at the U.S. Department of the Treasury in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein

U.S. Secretary of the Treasury Janet Yellen and Mexican Finance Minister Arturo Herrera Gutierrez speak before a bilateral meeting at the U.S. Department of the Treasury in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein

A floating security barrier is seen at a section that used to be underwater at Lake Oroville, which is the second largest reservoir in California and according to daily reports of the state's Department of Water Resources is near 35% capacity, near Oroville, California, U.S. June 16, 2021. Picture taken June 16, 2021. REUTERS/Aude Guerrucci

U.S. Senate Appropriations Committee Chair Sen. Patrick Leahy (D-VT) departs after U.S. Defense Secretary Lloyd Austin and Joint Chiefs of Staff Chair Gen. Mark Milley testfied at a Senate Appropriations Committee hearing on the defense department?s budget request on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Senator Chris Van Hollen (D-MD) speaks during a Senate Appropriations Committee hearing on the defense department’s budget request on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Defense Secretary Lloyd Austin laughs with Joint Chiefs of Staff Chair Gen. Mark Milley during a break in a Senate Appropriations Committee hearing on the defense department’s budget on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Defense Secretary Lloyd Austin laughs with Joint Chiefs of Staff Chair Gen. Mark Milley during a break in a Senate Appropriations Committee hearing on the defense department’s budget on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Defense Secretary Lloyd Austin testifies on the defense department’s budget request during a Senate Appropriations Committee hearing on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Defense Secretary Lloyd Austin testifies on the defense department?s budget request during a Senate Appropriations Committee hearing on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Senator Roy Blunt (R-MO) listens during a Senate Appropriations Committee hearing on the defense department?s budget request on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Defense Secretary Lloyd Austin and Joint Chiefs of Staff Chair Gen. Mark Milley testify on the defense department?s budget request during a Senate Appropriations Committee hearing on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Senator Shelley Moore Caputo (R-WV) listens during a Senate Appropriations Committee hearing on the defense department?s budget request on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Senator Jeanne Shaheen (D-NH) listens during a Senate Appropriations Committee hearing on the defense department?s budget request on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Senator Susan Collins (R-ME) talks with Senator Jerry Moran (R-KS) prior to a Senate Appropriations Committee hearing on the defense department?s budget request on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Senator Lindsey Graham (R-SC) speaks during a Senate Appropriations Committee hearing on the defense department’s budget request on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Senator Martin Heinrich (D-NM) listens during a Senate Appropriations Committee hearing on the defense department?s budget request on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Senator Roy Blunt (R-MO) listens during a Senate Appropriations Committee hearing on the defense department’s budget request on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

Joint Chiefs of Staff Chair Gen. Mark Milley testifies on the defense department?s budget request during a Senate Appropriations Committee hearing on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Senator Lisa Murkowski (R-AK) speaks during a Senate Appropriations Committee hearing on the defense department’s budget request on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Defense Secretary Lloyd Austin testifies on the defense department’s budget request during a Senate Appropriations Committee hearing on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

Joint Chiefs of Staff Chair Gen. Mark Milley testifies on the defense department?s budget request during a Senate Appropriations Committee hearing on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Defense Secretary Lloyd Austin testifies on the defense department?s budget request during a Senate Appropriations Committee hearing on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

Joint Chiefs of Staff Chair Gen. Mark Milley testifies on the defense department?s budget request as Defense Secretary Lloyd Austin listens during a Senate Appropriations Committee hearing on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Senator Jon Tester (D-MT) takes a call as he is seated prior to a Senate Appropriations Committee hearing on the defense department’s budget request on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Senate Appropriations Committee Chair Sen. Patrick Leahy (D-VT) talks with U.S. Defense Secretary Lloyd Austin prior to a Senate Appropriations Committee hearing on the defense department?s budget request on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Defense Secretary Lloyd Austin testifies on the defense department?s budget request during a Senate Appropriations Committee hearing on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Defense Secretary Lloyd Austin testifies on the defense department?s budget request during a Senate Appropriations Committee hearing on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Defense Secretary Lloyd Austin talks with Joint Chiefs of Staff Chair Gen. Mark Milley as they're seated to testify on the defense department?s budget request during a Senate Appropriations Committee hearing on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Defense Secretary Lloyd Austin and Joint Chiefs of Staff Chair Gen. Mark Milley testify on the defense department?s budget request during a Senate Appropriations Committee hearing on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Defense Secretary Lloyd Austin talks with Joint Chiefs of Staff Chair Gen. Mark Milley as they're seated to testify on the defense department’s budget request during a Senate Appropriations Committee hearing on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

U.S. Defense Secretary Lloyd Austin talks with Joint Chiefs of Staff Chair Gen. Mark Milley as they're seated to testify on the defense department?s budget request during a Senate Appropriations Committee hearing on Capitol Hill in Washington, U.S., June 17, 2021. REUTERS/Evelyn Hockstein/Pool

Police officers from the national security department escort Apple Daily Digital Platform Director Cheung Chi-wai from the offices of Apple Daily and Next Media in Hong Kong, China June 17, 2021. REUTERS/Lam Yik

Police officers from the national security department escort Chief Operating Officer Chow Tat-kuen from the offices of Apple Daily and Next Media in Hong Kong, China June 17, 2021. REUTERS/Lam Yik

Police officers from the national security department escort Apple Daily's Deputy Chief Editor Chan Pui-man from the offices of Apple Daily and Next Media in Hong Kong, China June 17, 2021. REUTERS/Lam Yik TPX IMAGES OF THE DAY

Police officers from the national security department escort Apple Daily's Chief Executive Officer Cheung Kim-hung from the offices of Apple Daily and Next Media in Hong Kong, China June 17, 2021. REUTERS/Lam Yik

Police officers from the national security department place seized items into a police van outside the offices of Apple Daily and Next Media in Hong Kong, China June 17, 2021. REUTERS/Lam Yik

Senior superintendent of the police national security department Steve Li Kwai-wah speaks to the media outside the headquarters of Apple Daily and Next Media after police arrested five Apple Daily executives who were suspected to have breached the new national security law, in Hong Kong, China June 17, 2021. REUTERS/Lam Yik

A boat launch ramp is closed because of low water levels at Lake Oroville, which is the second largest reservoir in California and according to daily reports of the state's Department of Water Resources is near 35% capacity, near Oroville, California, U.S., June 16, 2021. Picture taken June 16, 2021. REUTERS/Aude Guerrucci

An aerial view shows houseboats anchored in low water levels and a boat ramp several feet above the water at Lake Oroville, which is the second largest reservoir in California and according to daily reports of the state's Department of Water Resources is near 35% capacity, near Oroville, California, U.S., June 16, 2021. Picture taken with a drone June 16, 2021. REUTERS/Aude Guerrucci

Trees burned during the 2020 Bear fire, and low water levels are visible at Lake Oroville, which is the second largest reservoir in California and according to daily reports of the state's Department of Water Resources is near 35% capacity, near Oroville, California, U.S., June 16, 2021. Picture taken June 16, 2021. REUTERS/Aude Guerrucci

An aerial view shows low water levels at Lake Oroville, which is the second largest reservoir in California and according to daily reports of the state's Department of Water Resources is near 35% capacity, near Oroville, California, U.S., June 16, 2021. Picture taken with a drone June 16, 2021. REUTERS/Aude Guerrucci

An aerial view shows weeds growing from a boat launch ramp at Lake Oroville, which is the second largest reservoir in California and according to daily reports of the state's Department of Water Resources is near 35% capacity, near Oroville, California, U.S., June 16, 2021. Picture taken with a drone June 16, 2021. REUTERS/Aude Guerrucci

Dry land is visible, at a section that is normally under water, on the banks of Lake Oroville, which is the second largest reservoir in California and according to daily reports of the state's Department of Water Resources is near 35% capacity near Oroville, California, U.S., June 16, 2021. Picture taken June 16, 2021. REUTERS/Aude Guerrucci