Current issues and factors impacting the supply chain. This can be particular to the United States or globally.

1. How has COVID affected the supply chain?
2. What are some of the issues related to cargo ships and containers?
3. How are oil and gas prices causing supply chain problems? How are they impacting prices?
4. Should US companies carry more inventory to guard against disruptions in the supply chain?
5. One references (source) on each question.

Please help. Thank you :-)