Water leaking inside van

64,000 miles.

Just out of no where, we developed a leak in our van. It is on the front passenger interior, where the passenger handle attaches to the top of the ceiling. Not sure where this might be leaking from, it is possible that it is coming from the windshield, or from the black rubber strip on the roof of the van which runs down the length of the roof. Is there a way to remove the black rubber strip to see if that is where it is leaking from? Is this a common issue?

Thanks!