Senate President Pro Tempore Panfilo “Ping” Lacson has questioned why former Department of Public Works and Highways (DPWH) Secretary Manuel Bonoan received handwritten “Post-It” memos from civilians or non-DPWH personnel endorsing projects during his term as secretary. In a radio interview, Lacson said he was “baffled” after discovering that Bonoan had acted on project endorsements written on Post-It notes that did not…