5 stories to follow: Sept. 17

A Emergency Response Team vehicle arrives to the scene where a gunman was reported at the Washington Navy Yard in Washington, on Monday, Sept. 16, 2013. (AP photo)

Here's your daily look at five stories to know about:

1. Navy Yard shooting: A shooting rampage at the Washington Navy Yard left 13 people, including the gunman, dead on Monday morning. Authorities are continuing to investigate the attack and the motive for the mass shooting remains a mystery. The lone gunman, 34-year-old Aaron Alexis, was a defense contract worker and former Navy reservist who had complained about discrimination. See Philly.com's complete coverage.

2. Sandusky appeal: Former Penn State assistant football coach Jerry Sandusky will be back in court today to appeal his conviction on child sex- abuse charges. 

3. Philly's finances: The Pennsylvania Intergovernmental Cooperation Authority meets today to vote on Philadelphia's five-year financial plan. City Controller Alan Butkovitz is encouraging the watchdog to reject the plan, due to concerns over the steadily dropping fund balance.

4. Priest in court: A Philadelphia priest is asking a state appeals court to throw out his landmark conviction on child-endangerment charges, and arguments are scheduled for this morning. Monsignor William Lynn is serving three to six years in prison for his handling of priest-abuse complaints; prosecutors say he endangered children by transferring accused pedophiles to new, unsuspecting parishes. His attorneys say he left his post in Philadelphia in 2004, so he shouldn't have been charged under a 2007 law.

5. Corbett's Medicaid proposal: Pennsylvania Gov. Tom Corbett says he will accept federal Medicaid funding -- becoming the 10th Republican governor to do so -- but only as part of a larger overhaul.