A paparazzo charged with recklessly pursuing Justin Bieber for photos will challenge the constitutionality of the law targeting aggressive celebrity-hounding tactics, his attorney said Friday.

Attorney David S. Kestenbaum filed a motion asking a judge to declare that the 2010 California statute penalizing those who drive recklessly in pursuit of commercial photos is unconstitutional.

Grammy-winning R&B singer Usher on Friday was awarded primary physical custody of his two sons, ending a long legal fight with his ex-wife.

Fulton County Superior Court Judge Bensonetta Tipton Lane ruled that the singer, 33, will have primary custody of 4-year-old Usher Raymond V and 3-year-old Naviyd Ely Raymond, according to Cherrise Boone, spokeswoman for the court clerk's office. His custody will start Sept. 1.

A U.S. appeals court on Friday refused to order the Obama administration to stop funding embryonic stem cell research, despite complaints the work relies on destroyed human embryos.

The U.S. Circuit Court of Appeals for the Washington area upheld a lower court decision throwing out a lawsuit that challenged federal funding for the research, which is used in pursuit of cures to deadly diseases. Opponents claimed the National Institutes of Health was violating the 1996 Dickey-Wicker law that prohibits taxpayer financing for work that harms an embryo.

An Alzheimer's treatment from Eli Lilly and Co. failed to slow memory decline in two separate patient studies, but the drug did show some potential to help in mild cases of the mind-robbing condition that is notoriously difficult to treat.

The Indianapolis drug maker’s announcement could be a step toward a long-awaited breakthrough in the fight against the disease. But researchers not tied to the studies — and Eli Lilly itself — cautioned against overreacting to the initial results.

A recently laid-off store worker shot a former colleague to death Friday morning outside New York's iconic Empire State Building before being killed by police, police said. Nine others were hit by gunfire in the confrontation, but police said all were expected to survive.

The shooting set off chaos in the heart of Manhattan at the height of the summer travel season and just after the morning rush hour. Police on their regular anti-terrorism duties in the highly touristed area rushed to the scene.

Drug maker Bristol-Myers Squibb Co. has scrapped a potential hepatitis C treatment after a patient participating in a test of the drug died of heart failure.

The New York Company said Thursday that it decided to discontinue development of the drug, labeled BMS-986094, in the interest of patient safety.

NASA has delayed the launch of its newest science satellites.

The countdown proceeded all the way down to the four-minute mark early Friday morning at Cape Canaveral in Florida. But a problem cropped up with the rocket's tracking beacon, a mandatory safety item.

ABC Family says it green-lighted a series pilot from Jennifer Lopez's production company about a lesbian couple and their diverse family.

ABC Family said Thursday the comedy-drama pilot, titled "The Fosters," is about two women raising a "21st century," multi-ethnic mix of foster and biological kids.

Viewers can now relive the drama of the Curiosity rover's landing on Mars with a new NASA video detailing the final moments of touchdown.

The space agency Thursday posted the video on its website embedded with audio from mission control. It starts with the heat shield falling away. The ground grows larger in view as Curiosity is lowered by cables inside an ancient Martian crater. "Touchdown confirmed" is heard followed by cheers.

Barcelona came from behind to beat Real Madrid 3-2 on Thursday in the opening leg of the Spanish Super Cup, giving Tito Vilanova a victory in his first meeting as head coach against counterpart Jose Mourinho.

The first meeting of the season between Spain's top clubs provided more of the usual heated rivalry to match the scorching summer night. It lived up to the expectations of the 91,728 fans as Vilanova faced Mourinho a year on from a famous clash that saw the Madrid manager poke his counterpart in the eye.