It's back to school for the Chicago Bears. Although, defensive coordinator Dennis Allen had a glass-half-empty view on Day 1. "Training camp is a long, dark tunnel," Allen said. The Bears reported to their first day of training camp practice on Wedesday, where it was a good day for the defense and we saw our first camp alignments.

Here is one burning question for each defensive position for the Chicago Bears ahead of training camp this week.

The Bears begin training camp this week. Here are players and key position battles to watch -- and a 53-man roster projection.