(March 8, 2016, 8:42 AM EST) -- SAN FRANCISCO — A man who sued the federal government and a national park in a California federal court filed an amended complaint March 1, adding a government contractor as a defendant, alleging that the tree company failed in its duty to protect him because it failed to implement a strategy to remove large seed pods from trees to protect the public from harm (Sean J. Mace v. The United States of America, et al., No. 3:15cv4060, N.D. Calif.)....