The father of a Muslim-American soldier killed in Iraq who is caught up in a war of words with Republican presidential candidate Donald Trump is an immigration lawyer who specializes in a highly controversial program accused of letting immigrants buy their way into the U.S. Khizr M. Khan's website notes that he works to help clients with the E-2 and EB-5 programs that let overseas investors buy into U.S. companies and also provides green cards for family members. It also said that he helps in the purchase of U.S. real estate and businesses. The website lists his ability to practice...