ISLAMABAD : The European Union's Ambassador to Pakistan, Lars-Gunnar Wigemark, called on President Asif Ali Zardari at the Aiwan-e-Sadr on Monday. Matters pertaining to Pak-EU relations were discussed during the meeting. The President also hosted lunch in the honour of the EU ambassador. Meanwhile, Chief of Air Staff, Air Chief Marshal Tahir Rafique Butt called on President Asif Ali Zardari at Aiwan-e-Sadr. Professional matters pertaining to Pakistan Air Force were discussed during the meeting.