[Updated at 11:55 a.m.] President Barack Obama has now signed into law a sweeping health care reform bill to enact the nation's most substantial social legislation in four decades and achieve a top priority of his administration.
Right before signing the bill Obama said the health care legislation is an "extraordinary achievement."
"We are not a nation that scales back its aspirations," he said. "We are not a nation that falls prey to doubt or mistrust. We don't fall prey to fear. We are not a nation that does what's easy. It's not who we are. It's not how we got here. We are a nation that faces its challenges and accepts its responsibilities."
[Updated at 11:52 a.m.] President Obama introduced the widow of the late Sen. Ted Kennedy, who championed health care reform.
"It's fitting that Ted's widow Vicki is here, and his niece, Caroline, his son, Patrick, whose vote helped make this health care reform a reality."
Patrick Kennedy is a congressman from Rhode Island.
[Updated at 11:48 a.m.] President Barack Obama said he's signing the health reform bill on behalf of several people, including his mother - "who argued with insurance companies even as she battled cancer in her final days."
[Updated at 11:46 a.m.] President Obama praised Senate Majority Leader Harry Reid and House Speaker Nancy Pelosi and congressional committee chairs, saying, "We are blessed by leaders in each chamber who not only do their jobs very well, but who never lost sight of the larger mission. They didn't play for the short term. They didn't play to the polls or the politics."
[Updated at 11:44 a.m.] President Obama said that under provisions of the health care bill that will take effect this year, small businesses will receive tax credits to help cover insurance, insurance companies won't be able to drop people's coverage when they get sick, and uninsured Americans and parents of children with pre-existing conditions will be able to purchase coverage.
[Updated at 11:38 a.m.] President Obama, greeted by applause from enthusiastic backers of his health care reform legislation, said, "Today after almost a century of trying, today after over a year of debate, today after all the votes have been tallied, health insurance reform becomes law in the United States of America."
Obama said he "is confident" the Senate will make improvements on the health care reform bill "swiftly." He said some health care reforms will take some time to phase in, but others will "take effect right away."
[Updated at 11:36 a.m.] Vice President Joe Biden, praising President Barack Obama's leadership in forging health care reform legislation, said, "Mr.
President, you've done what generations of not just ordinary, but great men and women have attempted to do. ... "You delivered on a promise, a promise you made to all Americans when we moved into this building," the White House.
[Updated at 11:27 a.m.] Vice President Joe Biden, introducing President Barack Obama before the health care reform bill signing, said, "this is a historic day."
[Posted at 11:23 a.m.] President Obama is set to sign a landmark health care reform bill into law at the White House on Tuesday.
The measure is a huge boost for Obama, who made health care reform a top priority.
President Obama will use 20 pens to sign the bill into law - a symbolic and customary gesture - so that he can give away the pens later as an honorary piece of history.
Now that the House has passed the Senate's health care reform bill and a package meant to reconcile differences between the House and Senate bills, the next step is for members of the Senate to sign off on those changes.