Has RadioShack gone out of business?

I'm curious to know, has RadioShack really closed down its operations? It seems like they used to be a staple in electronics retail, but I haven't seen a store in a while. Are they no longer in the market, or have they just shifted their focus to online sales? It's interesting to see how the retail landscape has changed over the years, and I'm wondering if RadioShack's story is a reflection of that. Can you clarify the current status of RadioShack for me?