HARRISBURG, Pa. (AP) — The federal judge who struck down Pennsylvania's law banning recognition of same-sex marriage says he saw no proof that same-sex marriage destroys the strength of families.

Judge John E. Jones III spoke Monday on WITF-FM's hour-long show "Smart Talk."

He was responding to a statement by Bishop David Zubik of the Roman Catholic Diocese of Pittsburgh read to him by the show's host. But Jones says a link between family strength and same-sex marriage hasn't been proven.

Jones noted he was the 13th state or federal judge to make a similar finding in an unbroken string of victories for gay-marriage backers.

Jones issued his decision May 20 in a challenge to Pennsylvania's 1996 law. Gov. Tom Corbett said he wouldn't appeal, ending the fight to prevent same-sex marriage in Pennsylvania.