PHILADELPHIA (AP) — Philadelphia is planning to upgrade its emergency radio system and buy some new helmets for its motorcycle unit some of the millions of dollars it's getting to host the Democratic National Convention, the mayor's office said Tuesday. The initial spending plan includes more than $8 million for personnel; more than $9.6 million for supplies like batteries for smartphones and motorcycle helmets; and $7.7 million for bigger equipment purchases, including 800 megahertz public safety radios. The Office of Emergency Management would not provide a breakdown of how many radios or helmets or other emergency equipment it is buying, citing security reasons.