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.

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

Up next in our training camp preview is defensive end, where the Bears have invested heavily into their two starters the last couple of years.