AP - Scientists unveiled the world's fastest supercomputer on Monday, a $100 million machine that for the first time has performed 1,000 trillion calculations per second in a sustained exercise.

AP - Sen. Edward M. Kennedy said it was "good to be home" after flying back to Massachusetts on Monday, one week after undergoing an aggressive and delicate surgery to treat a cancerous brain tumor.

AP - McCain fundraisers, once off limits to media, open to press ... First lady Laura Bush says she admires Hillary Clinton's 'grit and strength' ... Group's complaint questions transactions involving McCain aides ... Racial attitudes, spoken or not, pose challenge for Obama in Pennsylvania

Politico - To understand the stylistic gulf between Barack Obama and John McCain, first consider their cultural references.

AP - Joyce Susick is the type of voter who might carry Barack Obama to the White House — or keep him out. A registered Democrat in a highly competitive state, she is eager to replace George W. Bush, whom she ranks among the worst presidents ever.

AP - Republican John McCain reversed course Monday and allowed the media into a private fundraiser where he chided Democratic rival Barack Obama for his reluctance to agree to a series of joint town-hall meetings.

AP - The presidential campaign's focus turned sharply to the economy Monday, an inopportune time for Republican John McCain as Americans cope with record-high gasoline prices and a spike in job losses.

AP - Lots of Democrats love Hillary Rodham Clinton. Yet plenty of Republicans, conservatives and all-important independents can't stand her, suggesting possible pitfalls for Barack Obama should he make her his vice presidential running mate.

AP - While many people will work on their tans this summer, or on summer reading lists or on not working too hard, two exceptions — John McCain and Barack Obama — and their underlings will be working.

AP - Barack Obama joined family and neighbors for a bicycle ride along the shores of Lake Michigan on Sunday.

AFP - French President Nicolas Sarkozy used a visit to Athens on Friday to highlight immigration issues, defend the EU's Lisbon Treaty, and boost bilateral defence cooperation with his ally Greece.

AP - It has been 12 years since a group of American Indians sued the government, saying Washington had cheated them out of profits from land royalties since 1887.