Footprints Rekindle Hope of Finding Missing Children After Deadly Amazon Plane Crash

Small footprints found in Colombian jungle believed to belong to oldest child, indicating group may have changed course.
Over 100 special forces and 70 indigenous people involved in difficult search through virgin jungle.
Searchers have found complex elements such as baby bottle lid, indicating children are likely on the move and trying to find way out of jungle.
Adverse conditions including rain, wild animals, and dense jungle pose challenges, but authorities remain hopeful of finding children alive.
Pilot reported engine failure and was looking for emergency landing site before plane went down, killing all adults onboard.