Usage of relative pronouns and adverbs

The following is an excerpt from a New York Times article of April 6. Shouldn't "from where" be "from which" or just "where" without "from?"

“Tonight, I ordered a targeted military strike on the air base in Syria from where the chemical attack was launched,” Mr. Trump said in remarks at his Mar-a-Lago estate in Florida. “It is in this vital national security interest of the United States to prevent and deter the spread and use of deadly chemical weapons.”