Three things you need to know today.
Hot dog contest: For the first time in the 96-year history of the Nathan's July 4th International Hot Dog Eating Contest, the competition will include men's and women's divisions.
Male and female contestants will vie for equal purses of $20,000. The men's champ gets a mustard-yellow belt, the women's champ a pink belt.
World record holders are Joey "Jaws" Chestnut, who two years ago ate 68 hot dogs and buns in 10 minutes, and Sonya "The Black Widow" Thomas with 41 hot dogs and buns.
Watch live coverage from Coney Island, New York, on ESPN beginning at noon ET.
Yellowstone cleanup: Dozens more workers¬†have joined the effort to clean up an oil spill that dumped hundreds of barrels of crude into Montana's Yellowstone River, ExxonMobil said.
ExxonMobil said between 750 to 1,000 barrels (32,000 to 42,000 gallons) of oil escaped late Friday when a pipeline ruptured beneath the river near Billings. Some of the oil has washed ashore or formed pools of "milky brown" residue in river eddies, Yellowstone County Sheriff Mike Linder said.
High water and a swift current have helped break up the spill, local officials said.
But cleanup efforts have been hampered by flooding that has made it harder to track and clean up the oil, said Linder and Duane Winslow, the county's emergency services director.
Royal trip: Prince William and his wife, Catherine, will tour Prince Edward Island, the fifth day of their Canadian tour.
The Duke and Duchess of Cambridge will start the day with a visit to Province House, the second oldest active legislature building in Canada.
Later, Prince William will emphasize the Canadian military's contributions to the training of search-and-rescue pilots by taking part in a "waterbird" emergency landing exercise in a helicopter at Dalvay-by-the-Sea.
On Monday evening, the royal couple will travel to Yellowknife, in the Northwest Territories, for the next phase of their trip.