NATIONAL NEWS AT A GLANCE Editors: To avoid duplication, please note that all these stories are also moving in longer form. For publication on July 7. EAST SWELTERS IN TRIPLE DIGITS; MORE TO COME Up and down the Eastern Seaboard on Tuesday, safety concerns upended the usual routines as a brutal blast of heat brought temperatures in excess of 100 degrees in several cities, with little relief expected for days to come. The culprit was a high pressure system 'tethered along the East Coast,' said Charlie Foley, a meteorologist with the National Weather Service in Taunton, Mass. The system is drawing hot, humid air from the south and will probably stay put until a cold front moves in late this week, Foley said, pushing temperatures back into the relatively comfortable 80s. EPA RULES TO CUT AIR POLLUTION FROM COAL Acting under federal court order, the Obama administration proposed new air-quality rules on Tuesday for coal-burning power plants that officials said would bring major reductions in soot and smog from Texas to the Eastern Seaboard. Gina McCarthy, head of the EPA's air and radiation office, said the new rules would reduce emissions of sulfur dioxide and nitrogen oxides by hundreds of thousands of tons a year and bring $120 billion in annual health benefits. The rule would substantially reduce the unhealthy smog that shrouds American cities, especially during heat waves. JUSTICE DEPT. SUES ARIZONA OVER ITS IMMIGRATION LAW The Justice Department filed a lawsuit on Tuesday against Arizona to challenge a new state law intended to combat illegal immigration, arguing that it would undermine the federal government's pursuit of terrorists, gang members and other criminal immigrants. The Justice Department argues the law would divert federal and local law enforcement officers by making them focus on people who may not have committed crimes, and by causing the 'detention and harassment of authorized visitors, immigrants and citizens.' OBAMA TO BYPASS SENATE TO NAME HEALTH OFFICIAL President Barack Obama will bypass Congress and appoint Dr. Donald M. Berwick, a health policy expert, to run Medicare and Medicaid, the White House said Tuesday. Dan Pfeiffer, the White House communications director, said the 'recess appointment' was needed to carry out the new health care law. The law calls for huge changes in the programs, which together insure nearly one-third of all Americans. Obama decided to act because 'many Republicans in Congress have made it clear in recent weeks that they were going to stall the nomination as long as they could, solely to score political points,' Pfeiffer said. DAY 77: THE LATEST ON THE OIL SPILL Oil sheen and tar balls from the spill have been spotted in Lake Pontchartrain, which forms the northern boundary of New Orleans and was rescued in the 1990s from rampant pollution, according to the unified command for the gulf spill. Response crews placed a combined 600 feet of hard and soft boom in the Rigolets strait to prevent more oil from getting through to the lake. Nineteen manual skimming vessels and four decontamination vessels based out of Orleans and St. Tammany parishes were dispatched to the oiled areas. 