Several countries are demanding answers following new claims from National Security Agency leaker Edward Snowden that the United States didn't just spy on its own citizens but also on other governments.
China is the latest country joining in calls for Washington to explain the NSA programs that tracked millions of telephone records and foreign Internet activity on U.S. networks.
"We demand the whole truth be disclosed by the U.S administration, and we demand an unconditional apology by Mr. Obama," Albert Ho, a member of Hong Kong Legislature, said.
Meanwhile, top officials from the Obama and Bush administrations are defending the newly exposed secret surveillance programs, saying they've been essential to disrupting terrorist plots and have not infringed on Americans' civil liberties.
Snowden said the public deserved to know what was going on in order to decide what to do about it.
However, President Barack Obama's chief of staff Denis McDonough said the operations are constitutional and carefully overseen by authorities for any sign of abuse.
"When President Obama came into office in 2009, after being elected in 2008, he was pretty skeptical about the importance of these programs, so he took a very hard look at them," McDonough told CBS's "Face the Nation." "And as a result, we changed many things about how we oversee those programs."
Meanwhile, former Vice President Dick Cheney expressed concerns that Snowden "still has additional information that he hasn't released yet."
"The Chinese would welcome the opportunity and probably be willing to provide immunity for him or sanctuary for him, if you will, in exchange for what he presumably knows," he warned.
Snowden is still believed to be hiding out in Hong Kong. Many there support the whistleblower, with 33 percent of people in Hong Kong calling him a hero.