Five police officers and six others were taken to area hospitals after the gunfire near and inside a Planned Parenthood facility Friday.
Beginning Sunday, if the government wants to check on a phone number in a potential terrorism case, a request must be made to the phone company.
Refusing to be cowed, shoppers visited a traditional Christmas market, with less-traditional troops on patrol. NBC's Claudio Lavanga was there.
The names of the victims of the Paris massacre will be read out at a memorial in the French capital Friday.
Joseph Caputo, 23, will undergo a psychiatric evaluation before his next court appearance, officials said.