Exclusive-US law enforcement raids offices of Houston fuel trader Ikon Midstream
By Stefanie Eschenbacher, Stephen Eisenhammer, Laura Gottesdiener and Shariq Khan April 16 (Reuters) - U.S. authorities have raided the offices of Ikon Midstream, a Houston fuel trader whose diesel exports are part of fuel-smuggling investigations in Mexico, two U.S. officials and a Mexican security